PUBLISHED REFERENCES CITED IN MRDS

Abbott, J.T., 1976, Geologic map of the Big Narrows Quadrangle, Larimer County, Colorado: U.S. Geological Survey Geologic Quadrangle Map GQ-1323.

Adams, J.W., 1953, Beryllium deposits of the Mount Antero Region, Chaffee County, Colorado: U.S. Geological Survey Bulletin 982-D, p. 95-119.

Adams, J.W., and Stugard, Frederick, Jr., 1956, Wall-rock control of certain pitchblende deposits in Golden Gate Canyon, Jefferson County, Colorado: U.S. Geological Survey Bulletin 1030-G, p. 187-209.

Adams, J.W., Gude, A.J., III, and Beroni, E.P., 1953, Uranium occurrences in the Golden Gate Canyon and Ralston Creek areas, Jefferson County, Colorado: U.S. Geological Survey Circular 320, 16 p.

Adams, J.W., Hildebrand, F.A., and Havens, R.G., 1962, Thalenite from Teller County, Colorado: U.S. Geological Survey Professional Paper 450-D, p. D6-D8.

Afifi, A.M., 1981, Stratigraphy, petrology, and structure of Precambrian metavolcanic rocks in the Iris area, Gunnison and Saguache Counties, Colorado, in Epis, R.C., and Callender, J.F., eds., Western Slope Colorado: Western Colorado and eastern Utah: New Mexico Geological Society Guidebook, 32nd Field Conference, p. 287-292.

Anonymous, 1886, Sheep Mountain mines, Gunnison County: Engineering and Mining Journal, v. 42, p. 149.

Anonymous, 1976, [Untitled]: Wall Street Journal, v. 187, no. 37 (24 February), p. 6.

Anonymous, 1977, The Henderson Mine (Mill) concentrator: Journal of Metals, v. 29, no. 10 (October 1977), p. 9-12.

Anonymous, 1990, [Untitled]: Minerals Today, January 1990, p. 25.

Anonymous, 1990, [Untitled]: Minerals Today, July 1990, p. 30.

Argall, G.O., Jr., 1943, Scheelite occurrences in Colorado: Mines Magazine, v. 33, no. 6, Colorado School of Mines, p. 313-314.

Argall, G.O., Jr., 1949, Industrial minerals of Colorado: Colorado School of Mines Quarterly, v. 44, no. 2, 477 p.

Armbrustmacher, T.J., 1976, Thorium deposits in the Wet Mountains area, Fremont and Custer Counties, Colorado: U.S. Geological Survey Open-File Report 76-284.

Armbrustmacher, T.J., 1980, Abundance and distribution of thorium in the carbonatite stock at Iron Hill, Powderhorn District, Gunnison County, Colorado: U.S. Geological Survey Professional Paper 1049-B, p. B1-B11.

1

Aurand, H.A., 1920, Fluorspar deposits of Colorado: Colorado Geological Survey Bulletin 18, 94 p.

Aurand, H.A., 1920, Mineral deposits of the Western Slope [Colorado]: Colorado Geological Survey Bulletin 22, 78 p.

Babcock, J.W., 1980, Tallahassee Creek uranium deposits, in Babcock, J.W., and King, J.R., eds., Silver Cliff volcanic center and Tallahassee Creek uranium deposits guidebook: Wheat Ridge, Colorado, Denver Region Exploration Geologists Society, p. 15-31.

Ball Associates, Ltd. (Compiler), 1965, Surface and shallow oil-impregnated rocks and shallow oil field in the U.S.: U.S. Bureau of Mines Monograph 12, 375 p.

Barclay, C.S., 1968, Geology of the Gore Canyon-Kremmling area, Grand County, Colorado: U.S. Geological Survey Open-File Report.

Barker, Fred, 1969, Precambrian geology of the Needle Mountains, southwestern Colorado: U.S. Geological Survey Professional Paper 644-A, p. A1-A35.

Barnes, Harley, 1953, Geology of the Ignacio area, Ignacio and Pagosa Springs Quadrangles, Laplata and Archuleta Counties, Colorado: U.S. Geological Survey Oil and Gas Investigations OM-138.

Bartos, P.J., 1993, Comparison of gold-rich and gold-poor quartz-base metal veins, western San Juan Mountains, Colorado)the Mineral Point area as an example: Society of Economic Geologists Newsletter, v. 15, p. 1, 6-11.

Baskin, G.D., 1983, Mineral investigation of the Greenhorn Mountain Wilderness Study Area, Huerfano and Pueblo Counties, Colorado: U.S. Bureau of Mines Mineral Land Assessment Open-File Report MLA 26-83.

Bass, N.W., and Northrop, S.A., 1963, Geology of Glenwood Springs quadrangle and vicinity, northwestern Colorado: U.S. Geological Survey Bulletin 1142-J, p. J1-J74.

Bass, N.W., Eby, J.B., and Campbell, M.R., 1955, Geology and mineral fuels of parts of Routt and Moffat Counties, Colorado, in Contributions to Economic Geology 1955: U.S. Geological Survey Bulletin 1027-D, p. 143-250.

Bastin, E.S., 1923, Silver enrichment in the San Juan Mountains, Colorado, in Ransome, F.L., Mansfield, G.R., and Burchard, E.F., Contributions to Economic Geology, 1922; Part I.)Metals and nonmetals except fuels: U.S. Geological Survey Bulletin 735, p. 65-129.

Bastin, E.S., 1924, Observations on the rich silver ores of Aspen, Colorado: U.S. Geological Survey Bulletin 750, p. 41-62.

Bastin, E.S., and Hill, J.M., 1917, Economic geology of Gilpin County and adjacent parts of Clear Creek and Boulder Counties, Colorado: U.S. Geological Survey Professional Paper 94, p. 1-65.

2

Bateman, A.F., Jr., Allen, E.G., and Kennedy, J.P., 1978, Leaseable mineral and waterpower land classification map of the Cheyenne 1° X 2° quadrangle, Wyoming, Colorado, and Nebraska: U.S. Geological Survey Miscellaneous Investigations Series Map I-1106, scale 1:250,000.

Beard, T.N., Tait, D.B., and Smith, J.W., 1974, Nahcolite and dawsonite resources in the Green River Formation, Piceance Creek Basin, Colorado, in Murray, K.D., ed., Guidebook to the Energy Resources of the Piceance Creek Basin, Colorado: Rocky Mountain Association of Geologists Field Conference no. 25, p. 101-109.

Becker, R.M., Shannon, S.S., Jr., and Rose, C.K., 1961, Iron Mountain Titaniferous Magnetite Deposit, Fremont County, Colorado: U.S. Bureau of Mines Report of Investigations 5864, 18 p., plates.

Behre, C.H., Jr., 1953, Geology and ore deposits of the west slope of the Mosquito Range, Colorado: U.S. Geological Survey Professional Paper 235, 176 p.

Behre, C.H., Jr., Osborn, E.F., and Rainwater, E.H., 1936, Contact ore deposition at the Calumet Iron Mine, Colorado: Economic Geology v. 31, no. 8, p. 781-804.

Belser, Carl, 1956, Tungsten potential in Chaffee, Fremont, Gunnison, Lake, Larimer, Park, and Summit Counties, Colorado: U.S. Bureau of Mines Information Circular 7748, 31 p.

Belser, Carl, 1956, Tungsten potential in the San Juan area, Ouray, San Juan, and San Miguel Counties, Colorado: U.S. Bureau of Mines Information Circular 7731, 18 p.

Bergendahl, M.H., and Koschmann, A.H., 1971, Ore deposits of the Kokomo-Tenmile District, Colorado: U.S. Geological Survey Professional Paper 652, 53 p.

Beroni, E.P., and King, R.U., 1950, The Mike Doyle Carnotite deposit, El Paso County, Colorado: U.S. Geological Survey Trace Element Memorandum Report TEM-133.

Beroni, E.P., and McKeown, F.A., 1952, Reconnaissance for uraniferous rocks in northwestern Colorado, southwestern Wyoming, and northeastern Utah: U.S. Geological Survey Trace Elements Investigations Report TEI-308A.

Bever, J.E., 1953, Notes on some mineral occurrences in the Guffey Region, Colorado: American Mineralogist, v. 38, p. 138-141.

Bever, J.E., 1954, Geology of the Guffey area, Colorado: University of Michigan, Ann Arbor, Mich., Ph.D Thesis.

Bird, W.H., 1972, Mineral deposits of the southern portion of the Platoro Caldera Complex, Southeast San Juan Mountains, Colorado: The Mountain Geologist, v. 9, no. 4, p. 379-387.

3

Bird, W.H., 1973, The development of the southern portion of the Platoro Caldera Complex and its related mineral deposits, southeast San Juan Mountains, Colorado: Colorado School of Mines, Golden, Colo., Ph.D. Dissertation T-1440, 186 p.

Birmingham, S.D., and Van Loenen, R.E., 1983, Geochemical data from the West Needle and West Needle Contiguous Wilderness Study Areas, San Juan and La Plata Counties, Colorado: U.S. Geological Survey Open-File Report 83-814, 11 p.

Boardman, R.L., Litsey, L.R., and Bowers, H.E., 1958, Exploration for uranium-vanadium deposits by the U.S. Geological Survey in the Club Mesa area, Uravan District, Montrose County, Colorado: U.S. Geological Survey Mineral Investigations Field Studies Map MF-169, scale 1:7,200.

Boardman, S., 1976, Geology of the Precambrian metamorphic rocks of the Salida area, Chaffee County, Colorado: The Mountain Geologist, v. 13, no. 3, p. 89-100.

Boardman, S.J., 1971, Precambrian geology and mineral deposits of the Salida area, Chaffee County, Colorado: University of Michigan, Ann Arbor, Mich., Ph.D. Thesis.

Boos, M.F., 1954, Genesis of Precambrian pegmatites in the Denver Mountain Parks Aea, Colorado: Geological Society of America Bulletin, v. 65, no. 2, p. 115-141.

Boos, M.F., and Boos, C.M., 1933, Iron Dike [Abs.]: Geological Society of America Bulletin, v. 44, p. 73.

Bowers, H.E., and Shawe, D.R., 1961, Heavy minerals as guides to uranium-vanadium ore deposits in the Slick Rock District, Colorado: U.S. Geological Survey Bulletin 1107-B, p. 169-218.

Boyer, W.H., 1956, Geologic reconnaissance of the northwestern White River Plateau, Rio Blanco and Garfield Counties, Colorado: U.S. Atomic Energy Commission Open-File Report RME-90, 46 p.

Boyles, P.C., 1947, Gunnison County (Fifty years): Colorado Mining Association 1947 Mining Yearbook, p. 119.

Braddock, W.A., Calvert, R.H., Gawarecki, S.J., and Nutalaya, P., 1970, Geologic map of the Masonville quadrangle, Larimer County, Colorado: U.S. Geological Survey Geologic Quadrangle Map GQ-832, scale 1:24,000.

Braddock, W.A., Nutalaya, P., Gawarecki, S.J., and Curtin, G.C., 1970, Geologic map of the Drake quadrangle, Larimer County, Colorado: U.S. Geological Survey Geologic Quadrangle Map GQ-829, scale 1:24,000.

Brady, B.T., 1975, Map showing fluorspar deposits in Colorado: U.S. Geological Survey Mineral Investigations Resource Map MR-70, scale 1:500,000, 20 p.

4

Brink, C., Albert, K., and Hausel, W.D., 1986, Stream sediment exploration sampling for kimberlite in Colorado-Wyoming and techniques of diamond extraction, in Roberts, S., Metallic and nonmetallic deposits of Wyoming and adjacent areas, 1983 conference proceedings: Wyoming Geological Survey Public Information Circular 25, p. 114-115.

Brock, M.R., and Singewald, Q.D., 1968, Geologic map of the Mount Tyndall quadrangle, Custer County, Colorado: U.S. Geological Survey Geologic Quadrangle Map GQ-596, scale 1:24,000.

Bromfield, C.S., 1967, Geology of the Mount Wilson quadrangle, western San Juan Mountains, Colorado: U.S. Geological Survey Bulletin 1227, 100 p.

Bromfield, C.S., and Conroy, A.R., 1963, Preliminary geologic map of the Mount Wilson quadrangle, San Miguel County, Colorado: U.S. Geological Survey Mineral Investigations Field Studies Map MF-273, scale 1:24,000.

Bromfield, C.S., Williams, F.E., and Popenoe, Peter, 1972, Mineral resources of the Wilson Mountains Primitive Area, Colorado: U.S. Geological Survey Bulletin 1353-A, p. A1-A79.

Brown, L.J., and Malan, R.C., 1954, Reconnaissance for uranium in the south central part of Colorado: U.S. Atomic Energy Commission Open-File Report RME-1044, v. 54, 17 p.

Brown, W.H., 1926, The mineral zones of the White Cross District and neighboring deposits in Hinsdale County, Colorado: Mines Magazine, v. 15, Colorado School of Mines, p. 5-15.

Bruns, D.L., 1971, Geology of the Lake Mountain Northeast quadrangle, Saguache County, Colorado: Colorado School of Mines, Golden, Colo., M.S. Thesis, T-1367, 79 p.

Bruns, D.L., Epis, R.C., Weimer, R.J., and Steven, T.A., 1971, Stratigraphic relations between Bonanza center and adjacent parts of the San Juan volcanic field, south-central Colorado, in James, H.L., ed., Guidebook of the San Luis Basin, Colorado: New Mexico Geological Society Guidebook, 22nd Field Conference, p. 183-190.

Bryant, Bruce, 1969, Geologic map of the Maroon Bells quadrangle, Pitkin and Gunnison Counties, Colorado: U.S. Geological Survey Geologic Quadrangle Map GQ-788, scale 1:24,000.

Bryant, Bruce, 1970, Geologic map of the Hayden Peak quadrangle, Pitkin and Gunnison Counties, Colorado: U.S. Geological Survey Geologic Quadrangle Map GQ-863, scale 1:24,000.

Bryant, Bruce, 1971, Disseminated sulfide deposits in the eastern Elk Mountains, Colorado, in Geological Survey Research 1971: U.S. Geological Survey Professional Paper 750-D, p. D13-D25.

Bryant, Bruce, 1971, Geologic map of the Aspen quadrangle, Pitkin County, Colorado: U.S. Geological Survey Geologic Quadrangle Map GQ-933, scale 1:24,000.

5

Bryant, Bruce, 1972, Geologic map of the Highland Peak quadrangle, Pitkin County, Colorado: U.S. Geological Survey Geologic Quadrangle Map GQ-932, scale 1:24,000.

Bryant, Bruce, 1972, Map showing mines, prospects, and areas of significant silver, lead, and zinc production in the Aspen Quadrangle, Pitkin County, Colorado: U.S. Geological Survey Miscellaneous Investigations Series Map I-785-D.

Bryant, Bruce, 1974, Reconnaissance geologic map of the Conifer Quadrangle, Jefferson County, Colorado: U.S. Geological Survey Mineral Investigations Field Studies Map MF-597.

Bryant, Bruce, 1974, Reconnaissance geologic map of the Pine quadrangle, Jefferson County, Colorado: U.S. Geological Survey Mineral Investigations Field Studies Map MF-598, scale 1:24,000.

Bryant, Bruce, 1976, Reconnaissance geologic map of the Bailey Quadrangle, Jefferson and Park Counties, Colorado: U.S. Geological Survey Mineral Investigations Field Studies Map MF-816.

Bryant, Bruce, 1979, Geology of the Aspen 15-minute quadrangle, Pitkin and Gunnison Counties, Colorado: U.S. Geological Survey Professional Paper 1073, 146 p.

Bryant, Bruce, and Wobus, R.A., compilers, 1975, Preliminary geologic map of the southwestern quarter of the Denver 1x2 Quadrangle, Colorado: U.S. Geological Survey Open-File Report 75-340.

Bryant, Bruce, McGrew, L.W., and Wobus, R.A., 1981, Geologic map of the Denver 1° X 2° quadrangle, north-central Colorado: U.S. Geological Survey Miscellaneous Investigations Series Map I-1163, scale 1:250,000.

Bryant, Bruce, Miller, R.D., and Scott, G.R., 1973, Geologic map of the Indian Hills quadrangle, Jefferson County, Colorado: U.S. Geological Survey Geologic Quadrangle Map GQ-1073, scale 1:24,000.

Buckwalter, T.V., 1946, Geology of a part of the Dillon quadrangle, Colorado: University of Michigan, Ann Arbor, Mich., Ph.D. Thesis.

Budding, K.E., and Lawrence, V.A., 1983, Reconnaissance geologic map of the Spanish Peaks Wilderness Study Area, Huerfano and Las Animas Counties, Colorado: U.S. Geological Survey Miscellaneous Field Studies Map MF-1542-A, scale 1:50,000.

Budding, K.E., Lawrence, V.A., and Kluender, S.A., 1983, Mineral resource potential map of the Spanish Peaks Wilderness Study Area, Huerfano and Las Animas Counties, Colorado: U.S. Geological Survey Miscellaneous Field Studies Map MF-1542-C, scale 1:50,000.

Burbank, W.S., 1932, Geology and ore deposits of the Bonanza Mining District, Colorado: U.S. Geological Survey Professional Paper 169, 166 p.

6

Burbank, W.S., 1935, Geologic map of Colorado: U.S. Geological Survey Special Map.

Burbank, W.S., 1940, Structural control of ore deposition in the Uncompahgre District, Ouray County, Colorado, in Contributions to Economic Geology, 1938-39: U.S. Geological Survey Bulletin 906-E, p. 141-261.

Burbank, W.S., 1941, Structural control of ore deposition in the Red Mountains, Sneffels, and Telluride districts of the San Juan Mountains, Colorado: Colorado Scientific Society Proceedings, v. 14, no. 5, p. 141-261.

Burbank, W.S., 1960, Pre-ore propylitization, Silverton Caldera, Colorado, in Geological Survey Research 1960; Short papers in the geological sciences: U.S. Geological Survey Professional Paper 400-B, p. B12-B13.

Burbank, W.S., and Luedke, R.G., 1961, Origin and evolution of ore and gangue-forming solutions, Silverton Caldera, San Juan Mountains, Colorado, in Geological Survey Research 1961; Short papers in the geologic and hydrologic sciences, articles 147-292: U.S. Geological Survey Professional Paper 424-C, p. C7-C11.

Burbank, W.S., and Luedke, R.G., 1964, Geology of the Ironton quadrangle, Colorado: U.S. Geological Survey Geologic Quadrangle Map GQ-291, scale 1:24,000.

Burbank, W.S., and Luedke, R.G., 1966, Geologic map of the Telluride quadrangle, Colorado: U.S. Geological Survey Geologic Quadrangle Map GQ-504, scale 1:24,000.

Burbank, W.S., and Luedke, R.G., 1968, Geology and ore deposits in the western San Juan Mountains, Colorado, in Ridge, J.D., ed., Ore Deposits of the United States, 1933-1967, The Graton-Sales Volume: New York, American Institute of Mining, Metallurgical, and Petroleum Engineers, Inc., Volume I, p. 714-733.

Burbank, W.S., and Luedke, R.G., 1969, Geology and ore deposits of the Eureka and adjoining districts, San Juan Mountains, Colorado: U.S. Geological Survey Professional Paper 535, 73 p.

Burbank, W.S., Luedke, R.G., and Ward, F.N., 1972, Arsenic as an indicator element for mineralized volcanic pipes in the Red Mountains area, western San Juan Mountains, Colorado: U.S. Geological Survey Bulletin 1364, 31 p.

Burchard, E.F., 1909, Fluorspar and cryolite, in Mineral Resources of the United States; calendar year 1908: U.S. Geological Survey, pt. 2 (non-metallic), p. 614-615.

Burchard, E.F., 1911, Gypsum and plasters gypsum deposits in Eagle County: U.S. Geological Survey Bulletin 470-G, p. 354-365.

Burchard, E.F., 1913, Stone, in Mineral Resources of the United States; calendar year 1912: U.S. Geological Survey, pt. 2 (non-metallic), p. 811.

7

Burchard, H.C., 1883, Colorado: Report of the Director of the Mint on the production of gold and silver in the United States, 1881, p. 235-434.

Bush, A.L., 1951, Sources of lightweight aggregate in Colorado: Colorado Scientific Society Proceedings, v. 15, no. 8, p. 305-368.

Bush, A.L., and Bromfield, C.S., 1966, Geologic map of the Dolores Peak quadrangle, Dolores and San Miguel Counties, Colorado: U.S. Geological Survey Geologic Quadrangle Map GQ-536, scale 1:24,000.

Bush, A.L., Bromfield, C.S., and Pierson, C.T., 1959, Aerial geology of the Placerville quadrangle, San Miguel County, Colorado, in Contributions to Economic Geology 1957: U.S. Geological Survey Bulletin 1072-E, p. 299-384.

Bush, A.L., Bromfield, C.S., Marsh, O.T., and Taylor, R.B., 1961, Preliminary geologic map of the Gray Head quadrangle, San Miguel County, Colorado: U.S. Geological Survey Mineral Investigations Field Studies Map MF-176, scale 1:24,000.

Bush, A.L., Marsh, O.T., and Taylor, R.B., 1960, Aerial geology of the Little Cone quadrangle, Colorado: U.S. Geological Survey Bulletin 1082-G, p. 423-492.

Butler, A.P., Jr., Finch, W.I., and Twenhofel, W.S., 1962, Epigenetic uranium in the United States, exclusive of Alaska and Hawaii: U.S. Geological Survey Mineral Investigations Resource Map MR-21, scale 1:3,168,000.

Butler, B.S., and Vanderwilt, J.W., 1933, The Climax Molybdenum Deposit, Colorado: U.S. Geological Survey Bulletin 846-C, p. 195-237.

Butler, D.L., Krueger, R.P., Osmundson, B.C., Thompson, A.L., and McCall, S.K., 1991, Reconnaissance investigation of water quality, bottom sediment, and biota associated with irrigation drainage in the Gunnison and Uncompahgre River Basins and at Sweitzer Lake, west-central Colorado, 1988-89: U.S. Geological Survey Water-Resources Investigations Report 91-4103, 99 p.

Butler, G.M., 1915, The clays of eastern Colorado: Colorado Geological Survey Bulletin 8, 262 p.

Butler, J.R., 1954, Geology of an area north of Cotopaxi, Fremont County, Colorado: University of Colorado, Boulder, Colo., M.S Thesis.

Byerly, P.E., and Joesting, H.R., 1959, Regional geophysical investigations of the Lisbon Valley area, Utah and Colorado: U.S. Geological Survey Professional Paper 316-C, p. 39-50.

Cadigan, R.A., 1967, Petrology of the Morrison Formation in the Colorado Plateau region: U.S. Geological Survey Professional Paper 556, 113 p.

Cadigan, R.A., 1972, Geochemical anomalies and alteration in the Moenkopi Formation, Skull Creek, Moffat County, Colorado: U.S. Geological Survey Professional Paper 761, 21 p.

8

Campbell, M.R., 1922, Guidebook of the western United States: Part E. The Denver & Rio Grande Western Route: U.S. Geological Survey Bulletin 707, 266 p.

Carr, W.J., 1948, Uranium deposit in Moffat County, Colorado: U.S. Geological Survey Trace Element Memorandum Report TEM-60.

Carter, W.D., and Gualtieri, J.L., 1957, Preliminary geologic map of the Mount Peale 1 SE quadrangle, Montrose County, Colorado, and San Juan County, Utah: U.S. Geological Survey Mineral Investigations Field Studies Map MF-123, scale 1:24,000.

Carter, W.D., and Gualtieri, J.L., 1965, Geology and uranium-vanadium deposits of the La Sal quadrangle, San Juan County, Utah, and Montrose County, Colorado: U.S. Geological Survey Professional Paper 508, 82 p.

Carter, W.D., Gualtieri, J.L., and Shoemaker, E.M., 1958, Preliminary geologic map of the Mount Peale 1 NE quadrangle, San Juan County, Utah, and Montrose County, Colorado: U.S. Geological Survey Mineral Investigations Field Studies Map MF-139, scale 1:24,000.

Case, J.E., and Joesting, H.R., 1972, Regional geophysical investigations in the central Colorado Plateau: U.S. Geological Survey Professional Paper 736, 31 p.

Case, J.E., Joesting, H.R., and Byerly, P.E., 1963, Regional geophysical investigations in the La Sal Mountains area, Utah and Colorado: U.S. Geological Survey Professional Paper 316-F, p. 91-116.

Cater, F.W., Jr., 1953, Geology of the Anderson Mesa Quadrangle, Colorado, with a section on "The Mines", by C.F. Withington: U.S. Geological Survey Trace Element Memorandum Report TEM-690.

Cater, F.W., Jr., 1954, Geology of the Bull Canyon quadrangle, Colorado: U.S. Geological Survey Geologic Quadrangle Map GQ-33, scale 1:24,000.

Cater, F.W., Jr., 1955, Geology of the Anderson Mesa quadrangle, Colorado: U.S. Geological Survey Geologic Quadrangle Map GQ-77, scale 1:24,000.

Cater, F.W., Jr., 1955, Geology of the Calamity Mesa quadrangle, Colorado: U.S. Geological Survey Geologic Quadrangle Map GQ-61, scale 1:24,000.

Cater, F.W., Jr., 1955, Geology of the Davis Mesa quadrangle, Colorado: U.S. Geological Survey Geologic Quadrangle Map GQ-71, scale 1:24,000.

Cater, F.W., Jr., 1955, Geology of the Gypsum Gap quadrangle, Colorado: U.S. Geological Survey Geologic Quadrangle Map GQ-59, scale 1:24,000.

Cater, F.W., Jr., 1955, Geology of the Hamm Canyon quadrangle, Colorado: U.S. Geological Survey Geologic Quadrangle Map GQ-69, scale 1:24,000.

9

Cater, F.W., Jr., 1955, Geology of the Horse Range Mesa quadrangle, Colorado: U.S. Geological Survey Geologic Quadrangle Map GQ-64, scale 1:24,000.

Cater, F.W., Jr., 1955, Geology of the Joe Davis Hill quadrangle, Colorado: U.S. Geological Survey Geologic Quadrangle Map GQ-66, scale 1:24,000.

Cater, F.W., Jr., 1955, Geology of the Naturita NW quadrangle, Colorado: U.S. Geological Survey Geologic Quadrangle Map GQ-65, scale 1:24,000.

Cater, F.W., Jr., 1955, Preliminary geologic map of the Anderson Mesa quadrangle, Colorado: U.S. Geological Survey Mineral Investigations Field Studies Map MF-25, scale 1:24,000.

Cater, F.W., Jr., 1955, Preliminary geologic map of the Calamity Mesa quadrangle, Colorado: U.S. Geological Survey Mineral Investigations Field Studies Map MF-32, scale 1:24,000.

Cater, F.W., Jr., 1955, Preliminary geologic map of the Egnar quadrangle, Colorado: U.S. Geological Survey Mineral Investigations Field Studies Map MF-26, scale 1:24,000.

Cater, F.W., Jr., 1955, Preliminary geologic map of the Joe Davis Hill quadrangle, Colorado: U.S. Geological Survey Mineral Investigations Field Studies Map MF-27, scale 1:24,000.

Cater, F.W., Jr., 1955, Preliminary geologic map of the Naturita NW quadrangle, Colorado: U.S. Geological Survey Mineral Investigations Field Studies Map MF-30, scale 1:24,000.

Cater, F.W., Jr., and McKay, E.J., 1955, Preliminary geologic map of the Davis Mesa quadrangle, Colorado: U.S. Geological Survey Mineral Investigations Field Studies Map MF-31, scale 1:24,000.

Cater, F.W., Jr., and McKay, E.J., 1955, Preliminary geologic map of the Uravan quadrangle, Colorado: U.S. Geological Survey Mineral Investigations Field Studies Map MF-24, scale 1:24,000.

Cater, F.W., Jr., Butler, A.P., Jr., and McKay, E.J., 1955, Geology of the Uravan quadrangle, Colorado: U.S. Geological Survey Geologic Quadrangle Map GQ-78, scale 1:24,000.

Chapin, C.E., 1965, Geologic and petrologic features of the Thirty Nine Mile Volcanic Field, central Colorado: Colorado School of Mines, Golden, Colo., Ph.D. Dissertation, 176 p.

Chauvenet, Regis, 1885, Preliminary notes on the iron resources of Colorado: U.S. Geological Survey 6th Annual Report, 1885.

Chew, R.T., III, 1956, Uranium and vanadium deposits of the Colorado Plateau that produced more than 1,000 tons of ore through June 30, 1955: U.S. Geological Survey Mineral Investigations Field Studies Map MF-54, scale 1:750,000.

10

Christman, R.A., Brock, M.R., Pearson, R.C., and Singewald, Q.D., 1959, Geology and thorium deposits of the Wet Mountains, Colorado–A progress report: U.S. Geological Survey Bulletin 1072-H, p. 491-535.

Christman, R.A., Heyman, A.M., Dellwig, L.F., and Gott, G.B., 1953, Thorium investigations 1950-52, Wet Mountains, Colorado: U.S. Geological Survey Circular 290, 40 p.

Clement, J.F., 1952, The geology of the northeastern Baca Grant area, Saguache County, Colorado: Colorado School of Mines, Golden, Colo., M.S. Thesis T-764.

Coe, H.S., 1922, On reconnaissance examination of the Esperanza Mine, Saguache Mine, Saguache County, Colorado: Colorado Division of Mines, Unpublished Engineering Report.

Coffin, R.C., 1921, Radium, uranium, and vanadium deposits of southwestern Colorado: Colorado Geological Survey Bulletin 16, 231 p.

Coleman, R.G., and Delevaux, M.H., 1957, Occurrence of selenium in sulfides from some sedimentary rocks of the western United States: Economic Geology, v. 52, no. 5, p. 499-527.

Colorado Metal Mining Fund Board, 1960, Tungsten mines of Colorado: Denver, State of Colorado Metal Mining Fund Board, 78 p.

Colton, R.B., 1978, Geology in the Boulder-Fort Collins-Greeley area, Front Range Urban Corridor, Colorado: U.S. Geological Survey Miscellaneous Investigations Series Map I-855-G, scale 1:100,000.

Cook, D.R., 1952, The geology of the Pride of the West Vein System, San Juan County, Colorado: Colorado School of Mines, Golden, Colo., Ph.D. Dissertation, 137 p.

Coons, A.T., 1908, Slate, in Mineral Resources of the United States; calendar year 1909: U.S. Geological Survey, p. 525.

Cornwall, H.R., 1966, Nickel deposits of North America: U.S. Geological Survey Bulletin 1223, 62 p.

Cox, D.C., Benson, W.E., Steven, T.A., and Van Alstine, R.E., 1948, Fluorite deposits of the Northgate District, Jackson County, Colorado: U.S. Geological Survey Strategic Minerals Inventory, Preliminary Report 3-220, 14 p.

Crawford, R.D., 1913, Geology and ore deposits of the Monarch and Tomichi Districts, Colorado: Colorado Geological Survey Bulletin 4, 317 p.

Crawford, R.D., and Gibson, R., 1925, Geology and ore deposits of the Red Cliff District, Colorado: Colorado Geological Survey Bulletin 30, 89 p.

11

Crawford, R.D., and Worcester, P.G., 1916, Geology and ore deposits of the Gold Brick District, Colorado: Colorado Geological Survey Bulletin 10, 116 p.

Cross, C.W., 1891, On alunite and diaspore from the Rosita Hills, Colorado: American Journal of Science, 3rd Series, v. 41, no. 246, p. 466-475.

Cross, C.W., 1894, Description of the Pikes Peak Quadrangle, in Pikes Peak Folio, Colorado: U.S. Geological Survey, Geologic Atlas of the United States, Folio 7.

Cross, C.W., 1896, Geology of Silver Cliff and the Rosita Hills, Colorado: U.S. Geological Survey 17th Annual Report; Part II, p. 269-403.

Cross, C.W., and Hillebrand, W.F., 1885, Contributions to the mineralogy of the Rocky Mountains: U.S. Geological Survey Bulletin 20, 114 p.

Cross, Whitman, and Hole, A.D., 1910, Engineer Mountain Folio, Colorado: U.S. Geological Survey, Geologic Atlas of the United States, Folio 171, 14 p.

Cross, Whitman, and Larsen, E.S., 1935, A brief review of the geology of the San Juan region of southwestern Colorado: U.S. Geological Survey Bulletin 843, 138 p.

Cross, Whitman, and Purington, C.W., 1899, Telluride Folio, Colorado: U.S. Geological Survey, Geologic Atlas of the United States, Folio 57, 19 p.

Cross, Whitman, and Ransome, F.L., 1905, Rico Folio, Colorado: U.S. Geological Survey, Geologic Atlas of the United States, Folio 130, 20 p.

Cross, Whitman, Howe, Ernest, and Ransome, F.L., 1905, Silverton Folio, Colorado: U.S. Geological Survey, Geologic Atlas of the United States, Folio 120, 34 p.

Cross, Whitman, Howe, Ernest, Irving, J.D., and Emmons, W.H., 1905, Needle Mountains Folio, Colorado: U.S. Geological Survey, Geologic Atlas of the United States, Folio 131, 14 p.

Cross, Whitman, Spencer, A.C., and Purington, C.W., 1899, La Plata Folio, Colorado: U.S. Geological Survey, Geologic Atlas of the United States, Folio 60, 14 p.

Cruson, M.G., 1973, Geology and ore deposits of the Grizzly Peak Cauldron Complex, Sawatch Range, Colorado: Colorado School of Mines, Golden, Colo., Ph.D. Dissertation T-1538.

Dahlem, D.H., 1965, Geology of the Lookout Mountain area, Fremont County Colorado: University of Michigan, Ann Arbor, Mich., Ph.D. Thesis.

Dare, W.L., 1959, Underground mining methods and costs at three Salt Wash uranium mines of Climax Uranium County: U.S. Bureau of Mines Information Circular 7908, 36 p.

Dare, W.L., 1959, Uranium mining practices and costs at ten Salt Wash operations of Union Carbide Nuclear County: U.S. Bureau of Mines Information Circular 7922, 71 p.

12

Day, D.T., 1906, Mineral Resources of the United States, Vol. 1905: U.S. Geological Survey.

Day, D.T., and Richards, R.H., 1906, Useful minerals in the black sands of the Pacific Slope, in Mineral Resources of the United States, Vol. 1905: U.S. Geological Survey, p. 1192-1195.

del Rio, S.M., 1960, Mineral resources of Colorado, 1st sequel: Denver, State of Colorado Mineral Resources Board, 764 p.

Desborough, G.A., and Mihalik, P., 1980, Accessory minerals in the igneous host of molybdenum ore, Henderson Mine, Colorado: U.S. Geological Survey Open-File Report 80-661.

Desborough, G.A., Raymond, W.H., and Soule, C., 1970, Placer gold of unique fineness in Douglas and Elbert Counties, Colorado: U.S. Geological Survey Professional Paper 700-D, p. D134-D139.

Deshayes, E.V., and Wilson, S.R., 1949, Investigation of Colorado Minerals Co. Calcite Deposits, Archuleta and Hinsdale Counties, Colorado: U.S. Bureau of Mines Report of Investigations 4554, 7 p.

Dickinson, K.A., 1981, Geologic controls of uranium mineralization in the Tallahassee Creek Uranium District, Fremont County, Colorado: The Mountain Geologist, v. 18, no. 4, p. 88-94.

Dings, M.G., 1949, The Gunnison Forks sulfur deposit, Delta County, Colorado: Colorado Scientific Society Proceedings, v. 15, no. 5, p. 237-256.

Dings, M.G., and Robinson, C.S., 1957, Geology and ore deposits of the Garfield quadrangle, Colorado: U.S. Geological Survey Professional Paper 289, 110 p.

Donnell, J.R., 1954, Tongue of Weber Sandstone in Maroon Formation near Carbondale and Redstone, northwestern Colorado: American Association of Petroleum Geologists Bulletin, v. 38, no. 8, p. 1817-1821.

Donnell, J.R., 1961, Tripartition of the Wasatch Formation near De Beque in northwestern Colorado, in Geological Survey Research 1961; Short papers in the geologic and hydrologic sciences, articles 1-146: U.S. Geological Survey Professional Paper 424-B, p. B147-B150.

Donner, H.F., 1949, Geology of the McCoy area, Eagle and Routt Counties, Colorado: Geological Society of America Bulletin, v. 60, no. 8, p. 1215-1248.

Dooley, J.R., Jr., and Hathaway, J.C., 1961, Two occurrences of thorium-bearing minerals with rhabdophane-like structure, in Geological Survey Research 1961; Short papers in the geologic and hydrologic sciences, articles 147-292: U.S. Geological Survey Professional Paper 424-C, p. C339-C341.

13

Downs, G.R., and Bird, A.G., 1965, The Schwartzwalder Uranium Mine, Jefferson County, Colorado: The Mountain Geologist, v. 2, no. 4, p. 183-191.

Drake, A.A., Jr., 1957, Geology of the Wood and East Calhoun Mines, Central City District, Gilpin County, Colorado: U.S. Geological Survey Bulletin 1032-C, p. 129-170.

Drobeck, P.A., 1981, Proterozoic syngenetic massive sulfide deposits in the Gunnison Gold Belt, Colorado, in Epis, R.C., and Callender, J.F., eds., Western Slope Colorado: Western Colorado and eastern Utah: New Mexico Geological Society Guidebook, 32nd Field Conference, p. 279-286.

Dyni, J.R., 1968, Geologic map of the Elk Springs quadrangle, Moffat County, Colorado: U.S. Geological Survey Geologic Quadrangle Map GQ-702, scale 1:24,000.

Ebbley, N.E., Jr., and Schumacher, J.I., 1949, Examination, mapping, and sampling of mine shafts and underground workings, Leadville, Lake County, Colorado: U.S. Bureau of Mines Report of Investigations 4518, 18 p.

Eckel, E.B., 1938, Copper ores of the La Plata District, Colorado, and their platinum content: Colorado Scientific Society Proceedings, v. 13, no. 12, p. 647-664.

Eckel, E.B., 1949, Geology and ore deposits of the La Plata District, Colorado: U.S. Geological Survey Professional Paper 219, 179 p.

Eckel, E.B., 1961, Minerals of Colorado)A 100-year record: U.S. Geological Survey Bulletin 1114, 399 p.

Eggler, D.H., 1968, Virginia Dale Precambrian ring-dike complex, Colorado-Wyoming: Geological Society of America Bulletin, v. 79, no. 11.

Eicher, L.J., Hedlund, D.C., and Miller, G.A., 1957, Preliminary geologic map and sections of the western part of the Gateway District, Mesa County, Colorado, and Grand County, Utah: U.S. Geological Survey Mineral Investigations Field Studies Map MF-122, scale 1:24,000.

Ekren, E.B., and Houser, F.N., 1957, Preliminary geologic map of the Sentinel Peak NW quadrangle, Montezuma County, Colorado: U.S. Geological Survey Mineral Investigations Field Studies Map MF-132, scale 1:24,000.

Ekren, E.B., and Houser, F.N., 1959, Preliminary geologic map of the Moqui SE quadrangle, Montezuma County, Colorado: U.S. Geological Survey Mineral Investigations Field Studies Map MF-221, scale 1:24,000.

Ekren, E.B., and Houser, F.N., 1965, Geology and petrology of the Ute Mountains area, Colorado: U.S. Geological Survey Professional Paper 481.

Eldridge, G.H., 1894, Description of the sedimentary formations, in Anthracite - Crested Butte Folio, Colorado: U.S. Geological Survey, Geologic Atlas of the United States, Folio 9.

14

Ellis, C.E., 1983, Mineral investigation of the Lost Creek Wilderness, Park and Jefferson Counties, Colorado: U.S. Bureau of Mines Mineral Land Assessment Open-File Report MLA 61-83, 31 p.

Emmons, S.F., 1877, Elkhead Mountains, in Hague, Arnold, and Emmons, S.F., Descriptive geology: U.S. Geological Exploration of the 40th Parallel, v. 2, p. 167-180.

Emmons, S.F., 1886, Geology and mining industry of Leadville, Colorado: U.S. Geological Survey Monograph 12, 770 p.

Emmons, S.F., 1896, The mines of Custer County, Colorado: U.S. Geological Survey 17th Annual Report; Part II, p. 405-472.

Emmons, S.F., 1898, Description of the Tenmile District Quadrangle, in Tenmile District Special Folio, Colorado: U.S. Geological Survey, Geologic Atlas of the United States, Folio 48, 6 p.

Emmons, S.F., Eldridge, G.H., and Cross, C.W., 1896, Geology of the Denver Basin in Colorado: U.S. Geological Survey Monograph 27.

Emmons, S.F., Irving, J.D., Laughlin, G.F., and Emmons, F.S., 1927, Geology and ore deposits of the Leadville Mining District, Colorado: U.S. Geological Survey Professional Paper 148, 368 p.

Emmons, W.H., 1905, The Neglected Mine and nearby properties, Durango quadrangle, Colorado: U.S. Geological Survey Bulletin 260, p. 121-127.

Emmons, W.H., 1906, The Cashin Mine, Montrose County, Colo., in Emmons, S.F., and Eckel, E.C., Contributions to Economic Geology, 1905: U.S. Geological Survey Bulletin 285, p. 125-128.

Emmons, W.H., and Larsen, E.S., 1923, Geology and ore deposits of the Creede District, Colorado: U.S. Geological Survey Bulletin 718, 198 p.

Epis, R.C., Wobus, R.A., and Scott, G.R., 1979, Geologic map of the Black Mountain Quadrangle, Fremont and Park Counties, Colorado: U.S. Geological Survey Miscellaneous Investigations Series Map I-1195.

Epis, R.C., Wobus, R.A., and Scott, G.R., 1979, Geologic map of the Guffey Quadrangle, Park County, Colorado: U.S. Geological Survey Miscellaneous Investigations Series Map I-1180.

Erdmann, C.E., 1934, The Book Cliffs coal field in Garfield and Mesa Counties, Colorado: U.S. Geological Survey Bulletin 851, 150 p.

Fay, R.O., 1983, Triassic Copper deposits in the Sheep Pen Sandstone of northwestern Cimarron County, Oklahoma: Oklahoma Geological Survey Circular 86, 24 p.

15

Fieldman, D.W., and Crowley, F.P., 1980, Silver deposits in the southern portion of the Silver Cliff Caldera, in Babcock, J.W., and King, J.R., eds., Silver Cliff volcanic center and Tallahassee Creek uranium deposits guidebook: Wheat Ridge, Colorado, Denver Region Exploration Geologists Society, p. 1-14.

Finch, W.C., editor, 1957, Guidebook to the geology of North and Middle Parks Basin, Colorado: Rocky Mountain Association of Geologists, Denver, Colo., 136 p.

Finch, W.I., 1959, Geology of uranium deposits in Triassic rocks of the Colorado Plateau region: U.S. Geological Survey Bulletin 1074-D, p. 124-164.

Finch, W.I., 1967, Geology of epigenetic uranium deposits in sandstone in the United States: U.S. Geological Professional Paper 538.

Finlay, G.I., 1916, Description of the Colorado Springs Quadrangle, in Colorado Springs Folio, Colorado: U.S. Geological Survey, Geologic Atlas of the United States, Folio 203.

Fischer, R.P., 1936, Peculiar hydrothermal copper-bearing veins of the northeastern Colorado Plateau: Economic Geology, v. 31, no. 6, p. 571-599.

Fischer, R.P., 1942, Vanadium deposits of Colorado and Utah, a preliminary report, in Strategic minerals investigations, 1942: U.S. Geological Survey Bulletin 936-P, p. 363-394.

Fischer, R.P., 1947, Vanadium region of southwestern Colorado and southeastern Utah: U.S. Geological Survey Strategic Minerals Investigations Preliminary Report MS-3-0226.

Fischer, R.P., 1960, Vanadium-uranium deposits of the Rifle Creek area, Garfield County, Colorado: U.S. Geological Survey Bulletin 1101, 52 p.

Fischer, R.P., and Hilpert, L.S., 1952, Geology of the Uravan Mineral Belt: U.S. Geological Survey Bulletin 988-A, p. 1-13.

Fischer, R.P., (Compiler), 1946, Map showing mineral deposits of Colorado: U.S. Geological Survey Missouri Basin Studies MB-8.

Fischer, R.P., Haff, J.C., and Rominger, J.F., 1947, Vanadium deposits near Placerville, San Miguel County, Colorado: Colorado Scientific Society Proceedings, v. 15, no. 3, p. 115-146.

Fischer, R.P., Luedke, R.G., Sheridan, M.J., and Raabe, R.G., 1968, Mineral resources of the Uncompahgre Primitive Area, Colorado: U.S. Geological Survey Bulletin 1261-C, p. C1-C91.

Fisher, D.J., Erdmann, C.E., and Reeside, J.B., Jr., 1960, Cretaceous and Tertiary formations of the Book Cliffs, Carbon, Emery, and Grand Counties, Utah, and Garfield and Mesa Counties, Colorado: U.S. Geological Survey Professional Paper 332, 80 p.

16

Fisher, F.S., and Leedy, W.P., 1973, Geochemical characteristics of mineralized breccia pipes in the Red Mountain District, San Juan Mountains, Colorado: U.S. Geological Survey Bulletin 1381, 43 p.

Freeman, V.L., 1972, Geologic map of the Woody Creek quadrangle, Pitkin and Eagle Counties, Colorado: U.S. Geological Survey Geologic Quadrangle Map GQ-967, scale 1:24,000.

Gable, D.J., 1968, Geology of the crystalline rocks in the western part of the Morrison quadrangle, Jefferson County, Colorado: U.S. Geological Survey Bulletin 1251-E, p. E1-E45.

Gale, H.S., 1906, The Hahns Peak gold field, Colorado, in Emmons, S.F., and Eckel, E.C., Contributions to Economic Geology, 1905: U.S. Geological Survey Bulletin 285, p. 28-34.

Gale, H.S., 1907, Carnotite in Rio Blanco County, Colorado: U.S. Geological Survey Bulletin 315-C, p. 110-117.

Gale, H.S., 1908, Gold placer deposits near Lay, Routt County, Colorado: U.S. Geological Survey Bulletin 340-A, p. 84-95.

Gallagher, Gerald L., 1976, Uranium favorability of Precambrian Rocks in the Badger Flats-Elkhorn thrust area, Park and Teller Counties, Colorado: Bendix Field Engineering Corporation, U.S. Department of Energy, Grand Junction, Colo., GJBX-055(76), 35 p.

Garrels, R.M., and Larsen, E.S., 1959, Geochemistry and mineralogy of the Colorado Plateau uranium ores: U.S. Geological Survey Professional Paper 320, 236 p.

Garrett, H.L., 1950, The geology of Star Basin and Star Mine, Gunnison County, Colorado: Colorado School of Mines, Golden, Colo., M.S. Thesis, 45 p.

Gaskill, D.L., 1956, Geology of the White Rock Mountain area, Gunnison County, Colorado: University of New Mexico, Albuquerque, N.M., M.S. Thesis, 175 p.

Gaskill, D.L., and Godwin, L.H., 1966, Geologic map of the Marble quadrangle, Gunnison and Pitkin Counties, Colorado: U.S. Geological Survey Geologic Quadrangle Map GQ-512, scale 1:24,000.

Gaskill, D.L., Godwin, L.H., and Mutschler, F.E., 1967, Geologic map of the Oh-Be-Joyful quadrangle, Gunnison County, Colorado: U.S. Geological Survey Geologic Quadrangle Map GQ-578, scale 1:24,000.

Gaskill, D.L., Rosenbaum, J.G., King, H.D., Meeves, H.C., and Bieniewski, K.L., 1977, Mineral resources of the West Elk Wilderness and vicinity, Delta and Gunnison Counties, Colorado: U.S. Geological Survey Open-File Report 77-751, 111 p.

Gilbert, G.K., 1897, Description of the Pueblo Quadrangle, in Pueblo Folio, Colorado: U.S. Geological Survey, Geologic Atlas of the United States, Folio 36, 9 p.

17

Glass, J.J., Rose, H.J., Jr., and Over, E., 1958, Notes on the mineralogy of an yttrium-bearing pegmatite body near Lake George, Park County, Colorado: American Mineralogist, v. 43, no. 9-10, p. 991-994.

Glosser, C., 1943, Vermiculite for victory: Mining Yearbook, 1943, Colorado Mining Association, Denver, Colo., p. 37-67.

Goddard, E.N., 1936, The geology and ore deposits of the Tincup Mining District, Gunnison County, Colorado: Colorado Scientific Society Proceedings, v. 13, no. 10, p. 551-595.

Goddard, E.N., 1946, Fluorspar deposits of the Jamestown District, Boulder County, Colorado: Colorado Scientific Society Proceedings, v. 15, no. 1, 47 p.

Goddard, E.N., 1949, Copper deposits of the Bear Creek District, in Eckel, E.B., (ed.,), Geology and Ore Deposits of the La Plata District, Colorado: U.S. Geological Survey Professional Paper 219.

Goddard, E.N., and Lovering, T.S., 1942, Nickel deposit near Gold Hill, Boulder County, Colorado: U.S. Geological Survey Bulletin 931-O, p. 349-362.

Goldstein, August, Jr., 1946, The vermiculites and their utilization: Colorado School of Mines Quarterly, v. 41, no. 4, 64 p.

Gott, G.B., McCarthy, J.H., Jr., VanSickle, G.H., and McHugh, J.B., 1967, Distribution of gold, tellerium, silver, and mercury in part of the Cripple Creek District, Colorado: U.S. Geological Survey Circular 543, 9 p.

Granger, H.C., and Beroni, E.P., 1950, Cook property, Jefferson County: U.S. Geological Survey Trace Element Memorandum Report TEM-20.

Griffitts, W.R., 1973, Beryllium: U.S. Geological Survey Professional Paper 820, p. 85-93.

Gross, E.B., 1962, Alkalic granites and pegmatites of the Mount Rosa area, El Paso and Teller Counties, Colorado: University of Michigan, Ann Arbor, Mich., Ph.D. Thesis, 196 p.

Gruner, J.W., Rosenzweig, A., and Smith, D.K., Jr., 1954, Annual report for April 1, 1953 to March 31, 1954: U.S. Atomic Energy Commission Open-File Report RME-3094, 37 p.

Gunther, C.G., 1905, The gold deposits of Plomo, San Luis Park, Colorado: Economic Geology, v. 1, p. 143-154.

Hagen, J.C., 1951, The geology of the Green Mountain Mine, San Juan County, Colorado: Colorado School of Mines, Golden, Colo., M.S. Thesis, 151 p.

Hail, W.J., Jr., 1965, Geology of northwestern North Park, Colorado: U.S. Geological Survey Bulletin 1188, 133 p.

18

Hail, W.J., Jr., 1968, Geology of southwestern North Park and vicinity, Colorado: U.S. Geological Survey Bulletin 1257, 119 p.

Hail, W.J., Jr., 1971, Geologic reconnaissance map of the Chris Mountain and Pagosa Springs Quadrangles: U.S. Geological Survey Open-File Report 71-142.

Hail, W.J., Jr., 1972, Reconnaissance geologic map of the Hotchkiss area, Delta and Montrose Counties, Colorado: U.S. Geological Survey Miscellaneous Investigations Series Map I-698, scale 1:48,000.

Hall, R.B., 1978, World nonbauxite aluminum resources; alunite: U.S. Geological Survey Professional Paper 1076-A, p. A1-A35.

Hall, R.B., 1980, Alunite--A potentially economic source of aluminium and potash?, in Schwochow, S.D., ed., Proceedings of the Fifteenth Forum on Geology of Industrial Minerals; Industrial Minerals in Colorado and the Rocky Mountain Region: Colorado Geological Survey Resource Series 8, p. 77-88.

Hancock, E.T., 1925, Geology and coal resources of the Axial and Monument Butte Quadrangles, Moffat County, Colorado: U.S. Geological Survey Bulletin 757, 134 p.

Hanley, J.B., Heinrich, E.W., and Page, L.R., 1950, Pegmatite investigations in Colorado, Wyoming, and Utah, 1942-1944: U.S. Geological Survey Professional Paper 227, 125 p.

Hansen, W.R., 1971, Geologic map of the Black Canyon of the Gunnison River and vicinity, western Colorado: U.S. Geological Survey Miscellaneous Investigations Series Map I-584, scale 1:31,680.

Hansen, W.R., 1978, Geologic map of the Zenobia Peak Quadrangle, Moffat County, Colorado: U.S. Geological Survey Geologic Quadrangle Map GQ-1408.

Hansen, W.R., and Carrara, P.E., 1980, Geologic map of the Tanks Peak Quadrangle, Moffat County, Colorado: U.S. Geological Survey Geologic Quadrangle Map GQ-1534.

Hansen, W.R., and Crosby, E.J., 1982, Environmental geology of the Front Range Urban Corridor and vicinity, Colorado, with a section on Physical properties and performance characteristics of surficial deposits and rock units in the greater Denver area, by R.R. Shroba: U.S. Geological Survey Professional Paper 1230, 99 p.

Harder, E.C., 1909, Iron ores, pig iron, and steel, in Mineral Resources of the United States; calendar year 1908: U.S. Geological Survey, pt. 1 (metallic), p. 112.

Harder, E.C., 1909, The Taylor Peak and Whitepine iron-ore deposits, Colorado, in Hayes, C.W., and Lindgren, Waldemar, Contributions to Economic Geology 1908; Part I.)Metals and nonmetals except fuels: U.S. Geological Survey Bulletin 380-E, p. 188-198.

Harrer, C.M., and Tesch, W.J., Jr., 1959, Reconnaissance of iron occurrences in Colorado: U.S. Bureau of Mines Information Circular 7918, 82 p.

19

Harrison, J.E., 1952, The uranium occurrences in the Martha E. Prospect, Lawson-Dumont District, Clear Creek County, Colorado: U.S. Geological Survey Trace Element Memorandum Report TEM-291.

Harrison, J.E., and Wells, J.D., 1956, Geology and ore deposits of the Freeland-Lamartine District, Clear Creek County, Colorado: U.S. Geological Survey Bulletin 1032-B, p. 3-127.

Harrison, J.E., and Wells, J.D., 1959, Geology and ore deposits of the Chicago Creek area, Clear Creek County, Colorado: U.S. Geological Survey Professional Paper 319, 92 p.

Hawley, C.C., 1963, Geology of the Pikes Peak Granite and associated ore deposits, Lake George beryllum area, Park County, Colorado: U.S. Geological Survey Open-File Report 63-44 (formerly Open-File Report #692), 283 p.

Hawley, C.C., 1969, Geology and beryllium deposits of the Lake George (or Badger Flats) beryllium area, Park and Jefferson Counties, Colorado, in Geology and ore deposits of the southern Tarryall region, Park and Jefferson Counties, Colorado: U.S. Geological Survey Professional Paper 608-A, p. A1-A44.

Hawley, C.C., and Moore, F.B., 1967, Geology and ore deposits of the Lawson-Dumont-Fall River District, Clear Creek County, Colorado: U.S. Geological Survey Bulletin 1231, 92 p.

Hawley, C.C., and Moore, F.B., 1967, Mines and prospects, Lawson-Dumont-Fall River District, Clear Creek County, Colorado: U.S. Geological Survey Open-File Report 67-109 (formerly Open-File Report #946), 115 p.

Haynes, C.V., Jr., 1965, Genesis of the White Cloud and related pegmatites, South Platte area, Jefferson County, Colorado: Geological Society of America Bulletin, v. 76, no. 4, p. 441-462.

Haynes, D.D., Vogel, J.D., and Wyant, D.G., 1972, Geology, structure, and uranium deposits of the Cortez quadrangle, Colorado and Utah: U.S. Geological Survey Miscellaneous Investigations Series Map I-629, scale 1:250,000.

Haynes, V., Jr., 1960, The rare earths, in del Rio, S.M., Mineral resources of Colorado, 1st sequel: Denver, State of Colorado Mineral Resources Board, p. 367-385.

Hedlund, D.C., 1974, Geologic map of the Big Mesa quadrangle, Gunnison County, Colorado: U.S. Geological Survey Geologic Quadrangle Map GQ-1153, scale 1:24,000.

Hedlund, D.C., and Olson, J.C., 1961, Four environments of thorium-, niobium-, and rare-earth-bearing minerals in the Powderhorn District of southwestern Colorado, in Geological Survey Research 1961; Short papers in the geologic and hydrologic sciences, articles 1-146: U.S. Geological Survey Professional Paper 424-B, p. B283-B286.

20

Hedlund, D.C., and Olson, J.C., 1973, Geologic map of the Carpenter Ridge quadrangle, Gunnison and Saguache Counties, Colorado: U.S. Geological Survey Geologic Quadrangle Map GQ-1070, scale 1:24,000.

Hedlund, D.C., and Olson, J.C., 1974, Geologic map of the Iris NW quadrangle, Gunnison and Saguache Counties, Colorado: U.S. Geological Survey Geologic Quadrangle Map GQ-1134, scale 1:24,000.

Hedlund, D.C., and Olson, J.C., 1975, Geologic map of the Powderhorn quadrangle, Gunnison and Saguache Counties, Colorado: U.S. Geological Survey Geologic Quadrangle Map GQ-1178, scale 1:24,000.

Hedlund, D.C., and Olson, J.C., 1981, Precambrian geology along parts of the Gunnison uplift of southwestern Colorado, in Epis, R.C., and Callender, J.F., eds., Western Slope Colorado: Western Colorado and eastern Utah: New Mexico Geological Society Guidebook, 32nd Field Conference, p. 267-272.

Heiland, C.A., Tripp, R.M., and Wantland, Dart, 1945, Geophysical surveys at the Malachite Mine, Jefferson County, Colorado: American Institute of Mining and Metallurgical Engineers Technical Publication 1947, 13 p.

Heinrich, E.W., 1948, Fluorite-rare earth mineral pegmatites of Chaffee and Fremont Counties, Colorado: American Mineralogist, v. 33, no. 1-2, p. 64-75.

Heinrich, E.W., 1948, Pegmatites of Eight Mile Park area, Fremont County, Colorado: American Mineralogist, v. 33, no. 7-8, 9-10, p. 420-448, 550-587.

Heinrich, E.W., 1953, Zoning in degmatite districts: American Mineralogist, v. 38, no. 1-2, p. 76.

Heinrich, E.W., 1981, Precambrian tungsten and copper-zinc skarn deposits of south-central Colorado: Colorado Geological Survey Resource Series 21, 115 p.

Heinrich, E.W., and Bever, J.E., 1957, Radioactive mineral occurrences in the Guffey area, Park and Fremont Counties, Colorado: Colorado School of Mines Quarterly, v. 52, no. 4.

Heinrich, E.W., and Gross, E.B., 1960, Fluocerite and associated minerals from the Black Cloud Pegmatite, Teller County, Colorado: American Mineralogist, v. 45, no. 3-4, p. 455-459.

Heinrich, E.W., and Vian, R.W., 1965, The Chief Lithium Pegmatite, Devils Hole, Fremont County, Colorado: American Mineralogist, v. 50, no. 1-2, p. 96-104.

Henderson, C.W., 1926, Mining in Colorado; a history of discovery, development, and production: U.S. Geological Survey Professional Paper 138, 263 p.

Henderson, C.W., 1929, Geology of the Northern Magnetic Deposit, Caribou, Boulder County, Colorado: U.S. Bureau of Mines Information Circular 439, p. 4-7.

21

Hess, F.L., 1913, Notes on the vanadium deposits near Placerville, Colorado, in Lindgren, Waldemar, Contributions to Economic Geology 1911; Part I.)Metals and nonmetals except fuels: U.S. Geological Survey Bulletin 530, p. 142-156.

Heyl, A.V., 1957, Zoning of the Bitter Creek vanadium-uranium deposits near Uravan, Colorado: U.S. Geological Survey Bulletin 1042-F, p. 187-201.

Heyl, A.V., 1964, Oxidized zinc deposits of the United States, Part 3 Colorado: U.S. Geological Survey Bulletin 1135-C.

Hill, J.M., 1909, Notes on the economic geology of southeastern Gunnison County, Colorado, in Hayes, C.W., and Lindgren, Waldemar, Contributions to Economic Geology 1908; Part I.)Metals and nonmetals except fuels: U.S. Geological Survey Bulletin 380-A, p. 21-40.

Hillebrand, W.F., 1900, Distribution and quantitative occurrence of vanadium and molybdenum rocks of the United States: U.S. Geological Survey Bulletin 167, p. 49-55.

Hills, R.C., 1901, Description of the Spanish Peaks Quadrangle, in Spanish Peaks Folio, Colorado: U.S. Geological Survey, Geologic Atlas of the United States, Folio 71.

Holmes, R.U., and Harrer, C.M., 1952, Investigations of the Colorado Copper Company properties, Mesa and Montrose Counties, Colorado: U.S. Bureau of Mines Report of Investigations 4869, 11 p.

Hon, Ken, and Mehnert, H.H., 1983, Compilation of revised ages of volcanic units in the San Juan Mountains, Colorado: U.S. Geological Survey Open-File Report 83-668, 16 p.

Hornback, V.Q., 1956, The geology of the Salina-Ingram Gulch area, Boulder County, Colorado: University of Colorado, Boulder, Colo., M.S Thesis.

Horton, F.W., 1916, Molybdenum its ores and their concentration, with a discussion of markets, prices and their uses: U.S. Bureau of Mines Bulletin 111, 132 p.

Houston, R.S., and Murphy, J.F., 1977, Depositional environment of upper Cretaceous black sandstones of the Western Interior: U.S. Geological Survey Professional Paper 994-A, p. A1-A29.

Hovorka, D.S., Patterson, C.G., and Toth, M.I., 1983, Geology and mineral resource potential of the Palisade Wilderness Study Area, Mesa County, Colorado (GEM Phase 2): U.S. Geological Survey Open-File Report 83-795, 29 p.

Howell, J.V., 1919, Geology and ore deposits of the Twin Lakes District of Colorado: Colorado Geological Survey Bulletin 17, 108 p.

Hubert, J.F., 1954, Structure and stratigraphy of an area east of Brush Creek, Eagle County, Colorado: University of Colorado, Boulder, Colo., M.S Thesis.

22

Huleatt, W.P., Hazen, S.W., Jr., and Traver, W.M., Jr., 1946, Exploration of vanadium region of western Colorado and eastern Utah: U.S. Bureau of Mines Report of Investigations 3930, 30 p.

Humphrey, A.G., 1955, The geology of Poorman Hill and the Poorman Mine, Boulder County, Colorado: University of Colorado, Boulder, Colo., M.S Thesis.

Hunt, C.B., 1969, Geologic history of the Colorado River, in The Colorado River Region and John Wesley Powell: U.S. Geological Survey Professional Paper 669, p. 59-130.

Hunt, W., 1980, Economic geology and geochemistry of part of the Montezuma District, Front Range, Colorado: Colorado School of Mines, Golden, Colo., M.S. Thesis, 106 p.

Hunter, J.F., 1915, Some cerusite deposits in Custer County, Colorado, in Contributions to Economic Geology: U.S. Geological Survey Bulletin 580.

Hunter, J.F., 1925, Precambrian rocks of the Gunnison River: U.S. Geological Survey Bulletin 777, 94 p.

Hunter, Z.M., 1955, Geology of the Foothills of the Front Range in northern Colorado: Geological Society of America Bulletin, v. 66, no. 12, Pt. 2, p. 1677.

Irving, J.D., 1905, Ore deposits in the vicinity of Lake City, Colorado, in Emmons, S.F., and Hayes, C.W., Contributions to Economic Geology, 1904: U.S. Geological Survey Bulletin 260, p. 78-84.

Irving, J.D., and Bancroft, Howland, 1911, Geology and ore deposits near Lake City, Colorado: U.S. Geological Survey Bulletin 478, 128 p.

Ives, R.L., 1941, The Green Ridge Pegmatites, Grand County, Colorado: Rocks and Minerals, v. 16, no. 1, p. 12-17.

Izett, G.A., 1968, Geology of the Hot Sulphur Springs quadrangle, Grand County, Colorado: U.S. Geological Survey Professional Paper 586, 79 p.

Izett, G.A., and Hoover, D.L., 1963, Preliminary geologic map of the Hot Sulphur Springs SE quadrangle, Grand County, Colorado: U.S. Geological Survey Mineral Investigations Field Studies Map MF-271, scale 1:24,000.

Izett, G.A., Cobban, W.A., and Gill, J.R., 1971, The Pierre Shale near Kremmling, Colorado, and its correlation to the east and the west: U.S. Geological Survey Professional Paper 684-A, 19 p.

Joesting, H.R., and Byerly, P.E., 1958, Regional geophysical investigations of the Uravan area, Colorado: U.S. Geological Survey Professional Paper 316-A, p. 1-17.

Johnson, R.B., 1959, Geology of the Huerfano Park area, Huerfano and Custer Counties, Colorado: U.S. Geological Survey Bulletin 1071-D.

23

Johnson, R.B., 1968, Geology of the igneous rocks of the Spanish Peaks region, Colorado: U.S. Geological Survey Professional Paper 594-G, p. G1-G47.

Johnson, R.B., 1969, Geologic map of the Trinidad quadrangle, south-central Colorado: U.S. Geological Survey Miscellaneous Investigations Series Map I-558, scale 1:250,000.

Johnson, R.B., and Stephens, J.G., 1954, Geology of the La Veta area, Huerfano County, Colorado: U.S. Geological Survey Oil and Gas Investigations OM-146.

Kanizay, S.P., 1955, Geology of Cross Mountain, Moffat County, Colorado, in Ritzma, H.R., and Oriel, S.S., eds., Guidebook to the Geology of Northwest Colorado: Intermountain Association of Petroleum Geologists, 6th Annual Field Conference, Rocky Mountain Association of Geologists, Annual Field Conference, 1955.

Keller, W.D., 1959, Clay minerals in the mudstones of the ore-bearing formations, in Garrels, R.M., and Larsen, E.S., (eds.), Geochemistry and Mineralogy of the Colorado Plateau Uranium Ores: U.S. Geological Survey Professional Paper 320.

Kelley, V.C., 1946, Ore deposits and mines of the Mineral Point, Poughkeepsie, and Upper Uncompahgre Districts, Ouray, San Juan, Hinsdale Counties, Colorado: Colorado Scientific Society Proceedings, v. 14, no. 7, p. 287-466.

Killeen, P.L., and Newman, W.L., 1965, Tin in the United States, exclusive of Alaska and Hawaii: U.S. Geological Survey Mineral Investigations Resource Map MR-44, scale 1:3,168,000.

King, R.U., 1970, Molybdenum in the United States, exclusive of Alaska and Hawaii: U.S. Geological Survey Mineral Investigations Resource Map MR-55, scale 1:2,500,000.

King, W.H., and Allsman, P.T., 1950, Reconnaissance of metal mining in the San Juan region, Ouray, San Juan and San Miguel Counties: U.S. Bureau of Mines Information Circular 7554, 109 p.

Kinney, D.M., Izett, G.A., King, R.U., and Taylor, R.B., 1968, The Poison Ridge volcanic center and related mineralization, Grand and Jackson Counties, Colorado: U.S. Geological Survey Circular 594, 8 p.

Kirkemo, H., Anderson, C.A., and Creasy, S.C., 1965, Investigations of molybdenum deposits in the conterminous United States, 1942-19??: U.S. Geological Survey Bulletin 1182-E, p. E1-E90.

Kirkham, R.M., O'leary, W., and Warner, J.W., 1980, Hydrogeologic and stratigraphic data pertinent to uranium mining, Cheyenne Basin, Colorado: Colorado Geological Survey Information Series 12, 31 p.

Kleinkopf, M.D., Peterson, D.L., and Mattick, R.E., 1979, Gravity, magnetic, and seismic studies of the Silver Cliff and Rosita Hills volcanic area, Colorado: U.S. Geological Survey Professional Paper 726-F, p. F1-F17.

24

Koch, G.S., Jr., 1971, Statistical analysis of assay data from the Round Mountain Silver Prospect, Custer County, Colorado: U.S. Bureau of Mines Report of Investigations 7486, 32 p.

Koksoy, Mumin, 1961, Geology of northern part of Tincup Mining District, Gunnison County, Colorado: Colorado School of Mines, Golden, Colo., M.S. Thesis, 99 p.

Koschmann, A.H., 1949, Structural control of the gold deposits of the Cripple Creek District, Teller County, Colorado: U.S. Geological Survey Bulletin 955-B, p. 19-60.

Koschmann, A.H., and Bergendahl, M.H., 1968, Principal gold-producing districts of the United States: U.S. Geological Survey Professional Paper 610, 283 p.

Koschmann, A.H., and Wells, F.G., 1946, Preliminary report of the Kokomo Mining District, Colorado: Colorado Scientific Society Proceedings, v. 15, no. 2.

Kunz, G.F., 1918, Platinum, in Roush, G.A., and Butts, A., eds., The Mineral Industry: Its Statistics, Technology and Trade during 1917, v. 26, New York, McGraw-Hill, p. 533-555.

La Plante, 1943, Gunnison County activities: Mining Yearbook, 1943, Colorado Mining Association, Denver, Colo.

Lakes, A., 1906, A peculiar occurrence of native mercury, free gold, and telluride minerals near Trimble Springs, Durango: Mining Reporter, v. 53, p. 389-390.

Lakes, A., 1910, Some remarkably fine marble quarries in Colorado: Mining World, v. 32, p. 609-611.

Lakes, Arthur, 1890, Extinct volcanoes in Colorado: Economic Geology, v. 5, p. 38-43.

Lakes, Arthur, 1896, Placer gold found in a primeval lake bed: Colliery Engineer and Metal Miner, v. 16, 147 p.

Lakes, Arthur, 1904, Gypsum deposits in Colorado, in Adams, G.I., Gypsum Deposits in the U.S.: U.S. Geological Survey Bulletin 223, p. 86-88.

Landes, K.K., 1935, Colorado pegmatites: American Mineralogist, v. 20, no. 5, p. 319-330.

Landis, E.R., 1959, Coal resources of Colorado, in Contributions to Economic Geology 1957: U.S. Geological Survey Bulletin 1072-C, p. 131-232.

Landis, E.R., 1959, Radioactivity and uranium content, Sharon Springs Member of the Pierre Shale, Kansas and Colorado: U.S. Geological Survey Bulletin 1046-L, p. 299-319.

Langenheim, R.L., Jr., 1947, Geology of Black Tiger Gulch, Boulder County, Colorado: University of Colorado, Boulder, Colo., M.S. Thesis.

25

Larrabee, D.M., 1947, Map showing construction materials and nonmetallic mineral resources of Colorado: U.S. Geological Survey Missouri Basin Studies MB-10.

Larsen, E.S., 1911, The economic geology of Carson Camp, Hinsdale County, Colorado, in Hayes, C.W., and Lindgren, Waldemar, Contributions to Economic Geology 1910; Part I.)Metals and nonmetals except fuels: U.S. Geological Survey Bulletin 470-B, p. 30-38.

Larsen, E.S., 1913, Alunite in the San Cristobal quadrangle, Colorado, in Lindgren, Waldemar, Contributions to Economic Geology 1911; Part I.)Metals and nonmetals except fuels: U.S. Geological Survey Bulletin 530, p. 179-183.

Larsen, E.S., and Hunter, J.F., 1913, Two sulphur deposits in Mineral County, Colorado: U.S. Geological Survey Bulletin 530-H, p. 363-369.

Larsen, E.S., Jr., 1930, Recent mining developments in the Creede District, Colorado, in Loughlin, G.F., Mansfield, G.R., and Burchard, E.F., Contributions to Economic Geology, 1929; Part I.)Metals and nonmetals except fuels: U.S. Geological Survey Bulletin 811-B, p. 89-112.

Larsen, E.S., Jr., and Cross, Whitman, 1956, Geology and petrology of the San Juan region, southwestern Colorado: U.S. Geological Survey Professional Paper 258, 303 p.

Larsen, E.S., Jr., and Jenks, W.F., 1942, Alkalic rocks of Iron Hill, Gunnison County, Colorado, in Shorter Contributions to General Geology, 1941-42.: U.S. Geological Survey Professional Paper 197-A, p. 1-64.

Lee, W.T., 1912, Coal fields of Grand Mesa and the West Elk Mountains, Colorado: U.S. Geological Survey Bulletin 510, 237 p.

Lemmon, D.M., and Tweto, O.L., 1962, Tungsten in the United States, exclusive of Alaska and Hawaii: U.S. Geological Survey Mineral Investigations Resource Map MR-25, scale 1:3,168,000.

Lenhart, W.B., 1953, Dredging for gravel and gold, Cooley Gravel Co.: Rock Products, v. 56, p. 94-98.

Leroy, L.W., 1944, Stratigraphy of the Golden-Morrison area, Jefferson County, Colorado: Colorado School of Mines, Golden, Colo., Ph.D. Dissertation, 186 p.

Lindgren, Waldemar, 1908, Notes on copper deposits in Chaffee, Fremont, and Jefferson Counties, Colorado: U.S. Geological Survey Bulletin 340-B, p. 157-174.

Lindquist, A.E., 1977, Metallic and coal resources, in Mineral Resources of the Chama-southern San Juan Mountains Wilderness Study Area, Mineral, Rio Grande, Archuleta, and Conejos Counties, Colorado: U.S. Geological Survey Open-File Report 77-309.

26

Lindvall, R.M., 1979, Geologic map of the Arvada quadrangle, Adams, Denver, and Jefferson Counties, Colorado: U.S. Geological Survey Geologic Quadrangle Map GQ-1453, scale 1:24,000.

Lindvall, R.M., 1979, Preliminary geologic map of the Commerce City quadrangle, Adams and Denver Counties, Colorado: U.S. Geological Survey Mineral Investigations Field Studies Map MF-1067, scale 1:24,000.

Lipman, P.W., 1974, Geologic map of the Platoro Caldera area, southeastern San Juan Mountains, southwestern Colorado: U.S. Geological Survey Miscellaneous Investigations Series Map I-828, scale 1:48,000.

Lipman, P.W., 1975, Evolution of the Platoro Caldera complex and related volcanic rocks, southeastern San Juan Mountains, Colorado: U.S. Geological Survey Professional Paper 852, p. 128.

Lipman, P.W., 1976, Caldera-collapse breccias in the western San Juan Mountains, Colorado: Geological Society of America Bulletin, v. 87, no. 10, p. 1397-1410.

Lipman, P.W., 1976, Geologic map of the Del Norte area, eastern San Juan Mountains, Colorado: U.S. Geological Survey Miscellaneous Investigations Series Map I-952, scale 1:48,000.

Lipman, P.W., 1976, Geologic map of the Lake City Caldera area, western San Juan Mountains, southwestern Colorado: U.S. Geological Survey Miscellaneous Investigations Series Map I-962, scale 1:48,000.

Lipman, P.W., and Hail, W.J., Jr., 1975, Reconnaissance geologic map of the Chama Peak Quadrangle, Conejos and Archleta Counties, Colorado: U.S. Geological Survey Mineral Investigations Field Studies Map MF-682, scale 1:48,000.

Lipman, P.W., Fisher, F.S., Mehnert, H.H., Naeser, C.W., Luedke, R.G., and Steven, T.A., 1976, Multiple ages of mid-Tertiary mineralization and alteration in the western San Juan Mountains, Colorado: Economic Geology, v. 71, no. 3, p. 571-588.

Lipman, P.W., Steven, T.A., Luedke, R.G., and Burbank, W.S., 1973, Revised volcanic history of the San Juan, Uncompahgre, Silverton, and Lake City Calderas in the western San Juan Mountains, Colorado: U.S. Geological Survey Journal of Research, v. 1, no. 6, p. 627-642.

Loughlin, G.F., 1926, Guides to ore in the Leadville District, Colorado: U.S. Geological Survey Bulletin 779, 37 p.

Lovering, T.G., and Beroni, E.P., 1959, Preliminary study of radioactive limonite in Colorado, Utah, and Wyoming: U.S. Geological Survey Bulletin 1046-N, p. 339-384.

Lovering, T.S., 1934, Geology and ore deposits of the Breckenridge Mining District, Colorado: U.S. Geological Survey Professional Paper 176, 64 p.

27

Lovering, T.S., 1935, Geology and ore deposits of the Montezuma quadrangle, Colorado: U.S. Geological Survey Professional Paper 178, 119 p.

Lovering, T.S., 1940, Tungsten deposits of Boulder County, Colorado: U.S. Geological Survey Bulletin 922-F, p. 135-156.

Lovering, T.S., and Goddard, E.N., 1950, Geology and ore deposits of the Front Range, Colorado: U.S. Geological Survey Bulletin 223, 319 p.

Lovering, T.S., and Tweto, Ogden, 1953, Geology and ore deposits of the Boulder County Tungsten District, Colorado: U.S. Geological Survey Professional Paper 245, 199 p.

Ludington, Steve, and Ellis, C.E., 1981, Mineral resource potential of the Hunter-Fryingpan Wilderness Area and Porphyry Mountain Wilderness Study Area, Pitkin County, Colorado: U.S. Geological Survey Miscellaneous Field Studies Map MF-1236-D, scale 1:50,000.

Luedke, R.G., and Burbank, W.S., 1962, Geology of the Ouray quadrangle, southwestern Colorado: U.S. Geological Survey Geologic Quadrangle Map GQ-152, scale 1:24,000.

Luedke, R.G., and Burbank, W.S., 1963, Tertiary volcanic stratigraphy in the western San Juan Mountains, Colorado, in Geological Survey Research 1963; Short papers in the geology and hydrology, articles 60-121: U.S. Geological Survey Professional Paper 475-C, p. C39-C44.

Luedke, R.G., and Burbank, W.S., 1981, Geologic map of the Uncompahgre (Ouray) Mining District, southwestern Colorado: U.S. Geological Survey Miscellaneous Investigations Series Map I-1247, scale 1:12,000.

Maberry, J.O., and Lindvall, R.M., 1972, Geologic map of the Parker quadrangle, Arapahoe and Douglas Counties, Colorado: U.S. Geological Survey Miscellaneous Investigations Series Map I-770-A, scale 1:24,000.

Maberry, J.O., and Lindvall, R.M., 1977, Geologic map of the Highlands Ranch Quadrangle, Arapahoe and Douglas Counties, Colorado: U.S. Geological Survey Geologic Quadrangle Map GQ-1413.

MacKay, I.H., 1953, Geology of the Thomasville-Woods Lake area, Eagle and Pitkin Counties, Colorado: Colorado School of Mines Quarterly, v. 48, no. 4, 76 p.

Macquown, W.C., Jr., 1945, Structure of the White River Plateau near Glenwood Springs, Colorado: Geological Society of America Bulletin, v. 56, no. 10, p. 877-892.

Malan, R.C., and Ranspot, H.W., 1959, Geology of the uranium deposits in the Cochetopa Mining District, Saguache and Gunnison Counties, Colorado: Economic Geology, v. 54, no. 1, p. 1-19.

28

Mallory, W.W., 1971, The Eagle Valley Evaporite, northwest Colorado ) a regional synthesis, in Contributions to General Geology, 1969: U.S. Geological Survey Bulletin 1311-E, p. E1-E31.

Mallory, W.W., Post, E.V., Ruane, P.J., Lehmbeck, W.L., and Stotelmeyer, R.B., 1966, Mineral resources of the Flat Tops Primitive Area, Colorado: U.S. Geological Survey Bulletin 1230-C, p. C1-C30.

March, S.P., and Sheridan, D.M., 1976, Rutile in Precambrian sillimanite-quartz gneiss and related rocks, east-central Front Range, Colorado: U.S. Geological Survey Professional Paper 959-G, p. G1-G17.

Marshall, C.H., 1959, Photogeologic map of the Delta quadrangle, Montrose and Delta Counties, Colorado: U.S. Geological Survey Miscellaneous Investigations Series Map I-282, scale 1:62,500.

Martin, R.A., 1981, Geophysical studies in the Powderhorn Wilderness Study Area, Colorado, in Geological Survey Research 1981: U.S. Geological Survey Professional Paper 1275, p. 3.

Mayhew, J.D., 1969, Geology of the eastern part of the Bonanza volcanic field, Saguache County, Colorado: Colorado School of Mines, Golden, Colo., M.S. Thesis, 94 p.

McGinnis, C.J., editor, 1956, Guidebook to the geology of the Raton Basin, Colorado: Rocky Mountain Association of Geologists, Denver, Colo., 148 p.

McKay, E.J., 1954, Preliminary geologic map of the Atkinson Creek quadrangle, Colorado: U.S. Geological Survey Mineral Investigations Field Studies Map MF-18, scale 1:24,000.

McKay, E.J., 1954, Preliminary geologic map of the Red Canyon quadrangle, Colorado: U.S. Geological Survey Mineral Investigations Field Studies Map MF-17, scale 1:24,000.

McKay, E.J., 1955, Geology of the Atkinson Creek quadrangle, Colorado: U.S. Geological Survey Geologic Quadrangle Map GQ-57, scale 1:24,000.

McKay, E.J., 1955, Geology of the Red Canyon quadrangle, Colorado: U.S. Geological Survey Geologic Quadrangle Map GQ-58, scale 1:24,000.

McKay, E.J., and Bergin, M.J., 1974, Geologic map of the Maybell Quadrangle, Moffat County, Colorado: U.S. Geological Survey Geologic Quadrangle Map GQ-1145.

McKenna, J.W., 1940, Geology of the Conger Mine, Boulder County, Colorado: University of Colorado, Boulder, Colo., M.S. Thesis.

McKnight, Edwin T., 1974, Geology and ore deposits of the Rico District, Colorado: U.S. Geological Survey Professional Paper 723, 100 p.

29

Meeves, H.C., 1966, Nonpegmatitic beryllium occurrences: U.S. Bureau of Mines Report of Investigations 6828, 68 p.

Meeves, H.C., Harrer, C.M., Salsbury, M.H., Konselman, A.S., and Spencer, S.S., Jr., 1966, Reconnaissance of beryllium-bearing pegmatite deposits in six western States, Arizona, Colorado, New Mexico, South Dakota, Utah, and Wyoming: U.S. Bureau of Mines Information Circular 8298, 34 p.

Mehnert, H.H., Slack, J.F., and Cebula, G.T., 1979, K-Ar age of alunite alteration at Red Mountain, Lake City area, western San Juan Mountains, Colorado: U.S. Geological Survey Open-File Report 79-1642, 8 p.

Meissner, F.F., 1954, The geology of Spring Creek Park, Gunnison County, Colorado: Colorado School of Mines, Golden, Colo., M.S. Thesis, 150 p.

Merewether, E.A., Compiler, 1960, Geologic map of the igneous and metamorphic rocks of Colorado showing location of uranium deposits: U.S. Geological Survey Miscellaneous Investigations Series Map I-309.

Mertie, J.B., Jr., 1969, Economic geology of the platinum metals: U.S. Geological Survey Professional Paper 630, 120 p.

Moench, R.H., 1964, Geology of Precambrian rocks, Idaho Springs District, Colorado: U.S. Geological Survey Bulletin 1182-A, p. A1-A70.

Moench, R.H., 1966, Mines and prospects, Idaho Springs District, Clear Creek and Gilpin Counties, Colorado: U.S. Geological Survey Open-File Report 66-87 (formerly Open-File Report #835).

Moench, R.H., and Drake, A.A., Jr., 1966, Economic geology of the Idaho Springs District, Clear Creek and Gilpin Counties, Colorado: U.S. Geological Survey Bulletin 1208, 91 p.

Moore, F.B., Cavender, W.S., and Kaiser, E.P., 1957, Geology and uranium deposits of the Caribou area, Boulder County, Colorado: U.S. Geological Survey Bulletin 1030-N.

Morgan, G.B., Jr., 1950, Geology of Williams Canyon area, north of Manitou Springs, El Paso County, Colorado: Colorado School of Mines, Golden, Colo., M.S. Thesis T-690, 80 p.

Mosier, D.L., Menzie, W.D., and Kleinhampl, F.J., 1986, Geologic and grade-tonnage information on Tertiary epithermal precious- and base-metal vein districts associated with volcanic rocks: U.S. Geological Survey Bulletin 1666, 39 p.

Muilenburg, G.A., 1919, Manganese deposits of Colorado: Colorado Geological Survey Bulletin 15, 74 p.

Mutschler, F.E., 1970, Geologic map of the Snowmass Mountain quadrangle, Pitkin and Gunnison Counties, Colorado: U.S. Geological Survey Geologic Quadrangle Map GQ-853, scale 1:24,000.

30

Naramore, Chester, 1907, Gold and silver, Colorado, New Mexico, South Dakota, Wyoming, in Mineral Resources of the United States, Vol. 1906: U.S. Geological Survey, p. 199-240.

Nash, J.T., 1979, Geology, petrology, and chemistry of the Leadville Dolomite: host for uranium at the Pitch Mine, Saguache County, Colorado: U.S. Geological Survey Open-File Report 79-1566, 54 p.

Nash, W.P., 1972, Mineralogy and petrology of the Iron Hill Carbonatite Complex, Colorado: Geological Society of America Bulletin, v. 83, no. 5, p. 1361-1382.

Nelson, C.J., and Riesmeyer, W.D., 1983, Geology of the Anaconda-Gunnison Mine area, Gunnison County, Colorado, in Handfield, R.C., eds., Gunnison Gold Belt and Powderhorn Carbonatite Field Trip Guidebook: Denver Region Exploration Geologists Society, p. 8-14.

Nelson-Moore, J.L., Collins, D.B., and Hornbaker, A.L., 1978, Radioactive mineral occurrences of Colorado and bibliography: Colorado Geological Survey Bulletin 40, 1054 p.

Neuerburg, G.J., 1971, Map showing distribution of selected accessory minerals in the Montezuma stock, Summit County, Colorado: U.S. Geological Survey Miscellaneous Investigations Series Map I-608, scale 1:48,000.

Neuerburg, G.J., and Botinelly, Theodore, 1972, Map showing geologic and structural control of ore deposits, Montezuma district, central Colorado: U.S. Geological Survey Miscellaneous Investigations Series Map I-750, scale 1:31,680.

Neuerburg, G.J., Botinelly, T., and Analysts, 1977, Selected geochemical and petrographic data for characterizing the mineralized rocks of the Montezuma Mining District, Central Colorado: U.S. Geological Survey Open-File Report 77-425, 298 p.

Neuerburg, G.J., Botinelly, Theodore, and Watterson, J.R., 1974, Molybdenite in the Montezuma District of central Colorado: U.S. Geological Survey Circular 704, 21 p.

Newman, J.W., 1976, The geology of the Tracy Canyon area, Saguache County, Colorado: Colorado State University, Ft. Collins, Colo., M.S. Thesis, 117 p.

Noble, E.A., and Annes, E.C., Jr., 1957, Reconnaissance for uranium in the Uinta Basin of Colorado and Utah: U.S. Atomic Energy Commission Open-File Report RME-94, 22 p.

Norton, J.J., 1966, Ternary diagrams of the quartz-feldspar content of pegmatites in Colorado, in Contributions to General Geology 1966: U.S. Geological Survey Bulletin 1241-D, p. D1-D16.

Olson, J.C., 1974, Geologic map of the Rudolph Hill quadrangle, Gunnison, Hinsdale, and Saguache Counties, Colorado: U.S. Geological Survey Geologic Quadrangle Map GQ-1177, scale 1:24,000.

31

Olson, J.C., 1976, Geologic map of the Houston Gulch quadrangle, Gunnison and Saguache Counties, Colorado: U.S. Geological Survey Geologic Quadrangle Map GQ-1287, scale 1:24,000.

Olson, J.C., 1976, Geologic map of the Iris quadrangle, Gunnison and Saguache Counties, Colorado: U.S. Geological Survey Geologic Quadrangle Map GQ-1286, scale 1:24,000.

Olson, J.C., 1977, Preliminary geologic map of part of the Pahlone Peak quadrangle, Gunnison, Saguache, and Chaffee Counties, Colorado: U.S. Geological Survey Open-File Report 77-325, scale 1:24,000.

Olson, J.C., and Adams, J.W., 1962, Thorium and rare earths in the United States, exclusive of Alaska and Hawaii: U.S. Geological Survey Mineral Investigations Resource Map MR-28, scale 1:3,168,000.

Olson, J.C., and Hedlund, D.C., 1973, Geologic map of the Gateview quadrangle, Gunnison County, Colorado: U.S. Geological Survey Geologic Quadrangle Map GQ-1071, scale 1:24,000.

Olson, J.C., and Hedlund, D.C., 1981, Alkalic rocks and resources of thorium and associated elements in the Powderhorn District, Gunnison County, Colorado: U.S. Geological Survey Professional Paper 1049-C, p. C1-C34.

Olson, J.C., and Steven, T.A., 1976, Geologic map of the Razor Creek Dome quadrangle, Saguache County, Colorado: U.S. Geological Survey Mineral Investigations Field Studies Map MF-748, scale 1:24,000.

Olson, J.C., and Steven, T.A., 1976, Geologic map of the Sawtooth Mountain quadrangle, Saguache County, Colorado: U.S. Geological Survey Mineral Investigations Field Studies Map MF-733, scale 1:24,000.

Olson, J.C., and Wallace, S.R., 1956, Thorium and rare-earth minerals in Powderhorn District, Gunnison County, Colorado, in Contributions to Economic Geology 1955: U.S. Geological Survey Bulletin 1027-O, p. 693-721.

Olson, J.C., Hedlund, D.C., and Hansen, W.R., 1968, Tertiary volcanic stratigraphy in the Powderhorn-Black Canyon region, Gunnison and Montrose Counties, Colorado: U.S. Geological Survey Bulletin 1251-C, p. C1-C29.

Olson, J.C., Steven, T.A., and Hedlund, D.C., 1975, Geologic map of the Spring Hill Creek quadrangle, Saguache County, Colorado: U.S. Geological Survey Mineral Investigations Field Studies Map MF-713, scale 1:24,000.

Osborn, E.F., and Rainwater, E.H., 1934, Geology of the Calumet, Colorado Mining District: Northwestern University, Evanston, Ill., M.A. Thesis.

Osterwald, E.J., 1977, The Beidell and Sanderson volcanic centers, Saguache County, Colorado: Colorado State University, Ft. Collins, Colo., M.S. Thesis, 158 p.

32

Overstreet, W.C., 1967, The geologic occurrence of monazite: U.S. Geological Survey Professional Paper 530.

Parker, B.H., Jr., 1961, The geology of the gold placers of Colorado: Colorado School of Mines, Golden, Colo., Ph.D. Dissertation, 578 p.

Parker, B.H., Jr., 1968, Placer gold in southwestern Colorado, in Shoemaker, John, ed., Guidebook of San Juan-San Miguel-La Plata region, New Mexico and Colorado: New Mexico Geological Society Guidebook, 19th Field Conference, p. 168-184.

Parker, B.H., Jr., 1974, Gold placers of Colorado (Book 1 of 2): Colorado School of Mines Quarterly, v. 69, no. 3, 268 p.

Parker, B.H., Jr., 1974, Gold placers of Colorado (Book 2 of 2): Colorado School of Mines Quarterly, v. 69, no. 4, 224 p.

Parker, R.L., 1963, Niobium and tantalum in the United States, exclusive of Alaska and Hawaii: U.S. Geological Survey Mineral Investigations Resource Map MR-36, scale 1:3,168,000.

Parker, R.L., and Sharp, W.N., 1970, Mafic-ultramafic rocks and associated carbonatites of the Gem Park Complex, Custer and Fremont Counties, Colorado: U.S. Geological Survey Professional Paper 649, 24 p.

Patton, H.B., 1908, The Montezuma Mining District of Summit County, Colorado: Colorado Geological Survey, First Report, v. 1, p. 105-144.

Patton, H.B., Hoskin, A.J., and Butler, G.M., 1912, Geology and ore deposits of the Alma District, Park County, Colorado: Colorado Geological Survey Bulletin 3, 284 p.

Patton, H.B., 1915, Geology and ore deposits of the Bonanza District, Saguache County: Colorado Geological Survey Bulletin 9, 136 p.

Patton, H.B., 1917, Geology and ore deposits of the Platoro-Summitville Mining District, Colorado: Colorado Geological Survey Bulletin 13, 122 p.

Patton, H.B., Smith, C.E., Butler, G.M., and Hoskin, A.J., 1910, Geology of the Grayback Mining District, Costilla County, Colorado: Colorado Geological Survey Bulletin 2, 111 p.

Pearl, R.M., 1941, Colorado turquoise localities: Economic Geology, v. 36, no. 3, p. 335-344.

Pearl, R.M., 1958, Colorado gem and mineral trails: Sage Books, Denver, Colo., 176 p.

Pearson, R.C., Braddock, W.A., Flanigan, V.J., and Patten, L.L., 1981, Mineral resources of the Comanche-Big South, Neota-Flat Top, and Never Summer Wilderness Study Areas, north-central Colorado: U.S. Geological Survey Open-File Report 81-578, 73 p.

33

Pearson, R.C., McCallum, M.E., Griswold, M.L., and Patten, L.L., 1982, Mineral resources of the Rawah Wilderness, Larimer County, Colorado, with a section on Interpretation of aeromagnetic data by V.J. Flanigan: U.S. Geological Survey Open-File Report 82-376, 27 p.

Peterson, W.L., 1964, Geology of the Platte Canyon Quadrangle, Colorado: U.S. Geological Survey Bulletin 1181-C, 23 p.

Phair, George, and Sims, P.K., 1954, Paragenesis and age of the uranium minerals in the Copper King Mine, Larimer County, Colorado: Geological Society of America Bulletin, v. 65, no. 12, Pt. 2, p. 1385.

Pierson, C.T., and Singewald, Q.D., 1953, Results of reconnaissance for radioactive minerals in parts of the Alma District, Park County, Colorado: U.S. Geological Survey Circular 294, 9 p.

Prather, T.L., 1961, Geology of the North Italian Mountain area, Gunnison County, Colorado: University of Colorado, Boulder, Colo., M.S. Thesis, 76 p.

Pratt, W.P., 1976, Preliminary geologic map of the Hermosa Peak quadrangle, Dolores, San Juan, La Plata, and Montezuma Counties, Colorado: U.S. Geological Survey Open-File Report 76-314, scale 1:20,000.

Pratt, W.P., McKnight, E.T., and DeHon, R.A., 1969, Geologic map of the Rico quadrangle, Dolores and Montezuma Counties, Colorado: U.S. Geological Survey Geologic Quadrangle Map GQ-797, scale 1:24,000.

Prosser, W.C., 1911, The Bear Creek sylvanite camp [near Silverton], Colorado: Engineering and Mining Journal, v. 91, p. 712.

Raines, G.L., 1971, Geology of the Sargents area, Gunnison and Saguache Counties, Colorado: Colorado School of Mines, Golden, Colo., M.S. Thesis, 55 p.

Ransome, F.L., 1901, A report on the economic geology of the Silverton quadrangle: U.S. Geological Survey Bulletin 182, 265 p.

Ransome, F.L., 1901, The ore deposits of the Rico Mountains, Colorado: U.S. Geological Survey 22nd Annual Report, 1900-1901; Part II - Ore deposits, p. 229-397.

Ransome, F.L., 1911, Geology and ore deposits of the Breckenridge District, Colorado: U.S. Geological Survey Professional Paper 75, 187 p.

Ransome, F.L., and Lindgren, W., 1906, Geology and gold deposits of the Cripple Creek District, Colorado: U.S. Geological Survey Professional Paper 54, 516 p.

Ratté, J.C., 1968, Alunite, in Mineral and Water Resources of Colorado, Report of the U.S. Geological Survey in collaboration with the Colorado Mining Industrial Development

34

Board: U.S. Government Printing Office, 90th Congress, 2d Session, Senate Document 115, p. 155-157.

Ratté, J.C., and Steven, T.A., 1967, Ash flows and related volcanic rocks associated with the Creede Caldera, San Juan Mountains, Colorado, in Shorter Contributions to General Geology, 1965: U.S. Geological Survey Professional Paper 524-H, p. H1-H58.

Reade, H.L., 1978, Uranium deposits, northern Denver Julesburg Basin, Colorado, in Pruit, J.D., and Coffin, P.E., eds., Energy Resources of the Denver Basin, U.S.A.: Rocky Mountain Association of Geologists Field Conference, Denver, Colo., p. 161-171.

Reichert, S.O, 1953, Geology of the Golden-Green Mountain area, Jefferson County, Colorado: Colorado School of Mines, Golden, Colo., Ph.D. Dissertation, 136 p.

Richardson, G.B., 1911, Clay near Calhan, El Paso County, Colorado: U.S. Geological Survey Bulletin 470-G, p. 293-296.

Richter, D.H., 1964, Four Corners Uranium Mine, in Sims, P.K. Sheridan, D.M., King, R.U., Moore, F.B., Richter, D.H., and Schlottman, J.D., Geology of Uranium Deposits in the Front Range, Colorado: U.S. Geological Survey Bulletin 1159.

Rickard, F., 1909, Gold ore near Newcastle, Colorado: Mining and Scientific Press, v. 99, p. 503.

Ridge, J.D., ed., 1968, Ore Deposits of the United States, 1933-1967, The Graton-Sales Volume: New York, American Institute of Mining, Metallurgical, and Petroleum Engineers, Inc., 2 volumes, 1880 p.

Robinson, C.S., 1955, Geology and ore deposits of the Whitepine area, Tomichi Mining District, Gunnison County, Colorado: University of Colorado, Boulder, Colo., Ph.D. Dissertation.

Rold, J.W., 1950, Geology of the Wellsville area, north flank of the Sangre De Cristo Mountain: Compass, v. 27, no. 3, p. 159-178.

Rold, J.W., 1961, The structure and Lower and Middle Paleozoic stratigraphy of the Wellsville area, Colorado, in Berg, R.R., and Rold, J.W., eds., Symposium on Lower and Middle Paleozoic Rocks of Colorado: Rocky Mountain Association of Geologists Guidebook, 12th Field Conference, Denver, Colo.

Rowley, P.D., Tweto, O.L., Hansen, W.R., and Carrara, P.E., 1979, Geologic map of the Vernal 1° X 2° Quadrangle, Colorado, Utah, and Wyoming: U.S. Geological Survey Mineral Investigations Field Studies Map MF-1163.

Rugg, E.S., 1956, Geology of the Carter Mine, Gunnison County, Colorado: Colorado School of Mines, Golden, Colo., M.S. Thesis, 54 p.

Sanders, C.W., 1934, Geology of Two Buttes Dome in southeastern Colorado: American Association of Petroleum Geologists Bulletin, v. 18, no. 7, p. 860-870.

35

Schmitt, L.J., and Raymond, W.H., 1977, Geology and mineral deposits of the Needle Mountains District, southwestern Colorado: U.S. Geological Survey Bulletin 1434, 40 p.

Schwartz, G.M., Varnes, D.J., and Eckel, E.B., 1949, Disseminated chalcopyrite with platinum and palladium, in Eckel, E.B., (ed.,), Geology and Ore Deposits of the La Plata District, Colorado: U.S. Geological Survey Professional Paper 219.

Schwochow, S.D., 1978, Mineral resources survey of Mesa County)A model study: Colorado Geological Survey Resource Series 2, 110 p.

Schwochow, S.D., (Compiler), 1981, Inventory of nonmetallic mining and processing operations in Colorado: Colorado Geological Survey Map Series 17.

Scott, D.C., 1983, Mineral investigation of the West Needle Wilderness Study Area and the BLM West Needle Contiguous Wilderness Study Area, La Plata and San Juan Counties, Colorado: U.S. Bureau of Mines Mineral Land Assessment Open-File Report MLA 35-83, 47 p.

Scott, G.R., 1963, Bedrock geology of the Kassler quadrangle, Colorado: U.S. Geological Survey Professional Paper 421-B, p. 71-125.

Scott, G.R., 1968, Geologic and structure contour map of the La Junta quadrangle, Colorado and Kansas: U.S. Geological Survey Miscellaneous Investigations Series Map I-560, scale 1:250,000.

Scott, G.R., 1969, General and engineering geology of the northern part of Pueblo, Colorado: U.S. Geological Survey Bulletin 1262, 131 p.

Scott, G.R., 1972, Geologic map of the Morrison Quadrangle, Jefferson County, Colorado: U.S. Geological Survey Miscellaneous Investigations Series Map I-790-A.

Scott, G.R., 1975, Reconnaissance geologic map of the Buena Vista Quadrangle, Chaffee and Park Counties, Colorado: U.S. Geological Survey Mineral Investigations Field Studies Map MF-657.

Scott, G.R., 1978, Map showing geology structure, and oil and gas fields in the Sterling 1° X 2° Quadrangle, Colorado, Nebraska, and Kansas: U.S. Geological Survey Miscellaneous Investigations Series Map I-1092.

Scott, G.R., and Taylor, R.B., 1974, Reconnaissance geologic map of the Electric Peak quadrangle, Custer and Saguache Counties, Colorado: U.S. Geological Survey Mineral Investigations Field Studies Map MF-628, scale 1:62,500.

Scott, G.R., and Taylor, R.B., 1974, Reconnaissance geologic map of the Rockvale quadrangle, Custer and Fremont Counties, Colorado: U.S. Geological Survey Mineral Investigations Field Studies Map MF-562, scale 1:24,000.

36

Scott, G.R., and Taylor, R.B., 1975, Post-paleocene Tertiary rocks and Quaternary volcanic ash of the Wet Mountain Valley, Colorado: U.S. Geological Survey Professional Paper 868, 15 p.

Scott, G.R., and Wobus, R.A., 1973, Reconnaissance geologic map of Colorado Springs and vicinity, Colorado: U.S. Geological Survey Mineral Investigations Field Studies Map MF-482, scale 1:62,500.

Scott, G.R., Taylor, R.B., Epis, R.C., and Wobus, R.A., 1978, Geologic map of the Pueblo 1° X 2° quadrangle, south-central Colorado: U.S. Geological Survey Miscellaneous Investigations Series Map I-1022, scale 1:250,000.

Sears, J.D., 1925, Geology and oil and gas prospects of part of Moffat County, Colorado, and Southern Sweetwater County, Wyoming: U.S. Geological Survey Bulletin 751-G, p. 269-319.

Sears, J.D., 1962, Yampa Canyon in the Uinta Mountains, Colorado: U.S. Geological Survey Professional Paper 374-I, p. I1-I33.

Segerstrom, Kenneth, and Kirby, S.H., 1969, Tuffaceous epiclastic breccia and sandstone near Hahns Peak, Colorado, and their genetic implications, in Geological Survey Research 1969: U.S. Geological Survey Professional Paper 650-B, p. B19-B22.

Segerstrom, Kenneth, and Young, E.J., 1972, General geology of the Hahns Peak and Farwell Mountain quadrangles, Routt County, Colorado, with a discussion of Triassic and Jurassic rocks, by G.N. Pipiringos: U.S. Geological Survey Bulletin 1349, 63 p.

Sharp, W.N., 1978, Geologic map of the Silver Cliff and Rosita volcanic centers, Custer County, Colorado: U.S. Geological Survey Miscellaneous Investigations Series Map I-1081, scale 1:24,000.

Sharp, W.N., and Gualtieri, J.L., 1968, Lead, copper, molybdenum, and zinc geochemical anomalies south of the Summitville District, Rio Grande County, Colorado: U.S. Geological Survey Circular 557, 7 p.

Sharps, J.A., 1976, Geologic map of the Lamar Quadrangle, Colorado and Kansas: U.S. Geological Survey Miscellaneous Investigations Series Map I-944.

Sharps, T.I., 1961, Perlite in Colorado and other Western States: Colorado School of Mines Mineral Industries Bulletin, v. 4, no. 6, 16 p.

Sharps, T.I., 1963, Dimension stone in Colorado: Colorado School of Mines Mineral Industries Bulletin, v. 6, no. 1, p. 5.

Sharps, T.I., 1963, Lead and zinc in Colorado: Colorado School of Mines Mineral Industries Bulletin, v. 6, no. 6, 15 p.

37

Sharps, T.I., 1965, Sulfur deposits of Colorado: Colorado School of Mines Mineral Industries Bulletin, v. 8, no. 6, p. 1-8.

Sharps, T.I., 1965, Tungsten in Colorado: Colorado School of Mines Mineral Industries Bulletin, v. 8, no. 5, 16 p.

Shawe, D.R., 1968, Petrography of sedimentary rocks in the Slick Rock District, San Miguel and Dolores Counties, Colorado: U.S. Geological Survey Professional Paper 576-B, p. B1-B33.

Shawe, D.R., 1970, Structure of the Slick Rock District and vicinity, San Miguel and Dolores Counties, Colorado: U.S. Geological Survey Professional Paper 576-C, p. C1-C18.

Shawe, D.R., 1976, Geologic history of the Slick Rock District and vicinity, San Miguel and Dolores Counties, Colorado: U.S. Geological Survey Professional Paper 576-E, p. E1-E19.

Shawe, D.R., and Parker, R.L., 1967, Mafic-ultramafic layered intrusion at Iron Mountain, Fremont County, Colorado: U.S. Geological Survey Bulletin 1251-A, p. A1-A28.

Shawe, D.R., Simmons, G.C., and Archbold, N.L., 1968, Stratigraphy of Slick Rock District and vicinity, San Miguel and Dolores Counties, Colorado: U.S. Geological Survey Professional Paper 576-A, p. A1-A108.

Shawe, D.R., Simmons, G.C., and Rogers, W.B., 1961, Preliminary geologic map of the Slick Rock District, San Miguel and Dolores Counties, Colorado: U.S. Geological Survey Mineral Investigations Field Studies Map MF-203, scale 1:48,000.

Sheridan, D.M., and Marsh, S.P., 1976, Geologic map of the Squaw Pass quadrangle, Jefferson and Gilpin Counties, Colorado: U.S. Geological Survey Geologic Quadrangle Map GQ-1337, scale 1:24,000.

Sheridan, D.M., and Raymond, W.H., 1978, Stratabound Precambrian zinc-copper deposit at the Sedalia Mine, Chaffee County, Colorado, in Shawe, D.R., eds., Guidebook on fossil fuels and metals, eastern Utah and western-southwestern-central Colorado: Professional Contributions of the Colorado School of Mines no. 9, p. 146-150.

Sheridan, D.M., Maxwell, C.H., Albee, A.L., and Van Horn, R., 1958, Preliminary map of bedrock geology of the Ralston Buttes quadrangle, Jefferson County, Colorado: U.S. Geological Survey Mineral Investigations Field Studies Map MF-179, scale 1:24,000.

Sheridan, D.M., Maxwell, C.H., Albee, A.L., and Van Horn, R., 1967, Geology and uranium deposits of the Ralston Buttes District, Jefferson County, Colorado: U.S. Geological Survey Professional Paper 520.

Sheridan, D.M., Raymond, W.H., and Cox, L.J., 1981, Precambrian sulfide deposits in the Gunnison region, Colorado, in Epis, R.C., and Callender, J.F., eds., Western Slope

38

Colorado: Western Colorado and eastern Utah: New Mexico Geological Society Guidebook, 32nd Field Conference, p. 273-277.

Sheridan, D.M., Reed, J.C., Jr., and Bryant, Bruce, 1972, Geologic map of the Evergreen Quadrangle, Jefferson County, Colorado: U.S. Geological Survey Miscellaneous Investigations Series Map I-786-A.

Sheridan, D.M., Taylor, R.B., and Marsh, S.P., 1968, Rutile and topaz in Precambrian gneiss, Jefferson and Clear Creek Counties, Colorado: U.S. Geological Survey Circular 567, 7 p.

Sherrard, M.S., Bankey, Viki, and Flanigan, V.J., 1984, Gravity survey data and a Bouguer gravity anomaly map of the Lost Creek Wilderness and vicinity, Park and Jefferson Counties, Colorado: U.S. Geological Survey Open-File Report 84-269, 16 p.

Shoemaker, E.M., 1955, Preliminary geologic map of the Roc Creek quadrangle, Colorado: U.S. Geological Survey Mineral Investigations Field Studies Map MF-23, scale 1:24,000.

Shoemaker, E.M., 1956, Geology of the Roc Creek quadrangle, Colorado: U.S. Geological Survey Geologic Quadrangle Map GQ-83, scale 1:24,000.

Siebenthal, C.E., 1910, Geology and water resources of the San Luis Valley, Colorado: U.S. Geological Survey Water-Supply Paper WSP-240, 128 p.

Siems, P.L., 1967, Volcanic and economic geology of the Rosita Hills and Silver Cliff Districts, Custer County, Colorado: Colorado School of Mines, Golden, Colo., Ph.D. Dissertation T-1042, 222 p.

Simmons, W.B., Jr., and Heinrich, E.W., 1980, Rare-earth pegmatites of the South Platte District, Colorado: Colorado Geological Survey Resource Series 11, 131 p.

Sims, P.K., 1963, Geology of uranium and associated ore deposits, central part of the Front Range mineral belt, Colorado: U.S. Geological Survey Professional Paper 371, 119 p.

Sims, P.K., 1964, Geology of the Central City quadrangle, Colorado: U.S. Geological Survey Geologic Quadrangle Map GQ-267, scale 1:24,000.

Sims, P.K., and Gable, D.J., 1967, Petrology and structure of Precambrian rocks, Central City quadrangle, Colorado: U.S. Geological Survey Professional Paper 554-E, scale 1:24,000, p. E1-E56.

Sims, P.K., Drake, A.A., Jr., and Tooker, E.W., 1963, Economic geology of the Central City District, Gilpin County, Colorado: U.S. Geological Survey Professional Paper 359, 231 p.

Sims, P.K., Osterwald, F.W., and Tooker, E.W., 1955, Uranium deposits in the Eureka Gulch area, Central City District, Gilpin County, Colorado: U.S. Geological Survey Bulletin 1032-A, p. 1-31.

39

Sims, P.K., Phair, G., and Moench, R.H., 1958, Geology of the Copper King Uranium Mine, Larimer Coutny, Colorado: U.S. Geological Survey Bulletin 1032-D, p. 171-221.

Sims, P.K., Sheridan, D.M., King, R.U., Moore, F.B., Richter, D.H., and Schlottman, J.D., 1964, Geology of uranium deposits in the Front Range, Colorado: U.S. Geological Survey Bulletin 1159, 116 p.

Singewald, J.T., Jr., 1913, Titaniferous iron ores of Colorado: U.S. Bureau of Mines Bulletin 64, p. 125-140.

Singewald, Q.D., 1942, Stratigraphy, structure, and mineralization in the Beaver-Tarryall area, Park County, Colorado - A Reconnaissance Report: U.S. Geological Survey Bulletin 928-A, p. 1-44.

Singewald, Q.D., 1947, Lode deposits of the Beaver-Tarryall area, Park County, Colorado, in Vanderwilt, J.W., Mineral resources of Colorado: Denver, State of Colorado Mineral Resources Board, p. 341-342.

Singewald, Q.D., 1950, Gold placers and their geologic environment in northwestern Park County, Colorado: U.S. Geological Survey Bulletin 955-D, p. 103-172.

Singewald, Q.D., 1951, Geology and ore deposits of the Upper Blue River area, Summit County, Colorado: U.S. Geological Survey Bulletin 970, 74 p.

Singewald, Q.D., 1955, Sugar Loaf and St. Kevin Mining Districts, Lake County, Colorado, in Contributions to Economic Geology 1955: U.S. Geological Survey Bulletin 1027-E, p. 251-299.

Singewald, Q.D., and Butler, B.S., 1931, Preliminary report on the geology of Mount Lincoln and Russia Mine, Park County, Colorado: Colorado Scientific Society Proceedings, v. 12, no. 12, p. 389-406.

Singewald, Q.D., and Butler, B.S., 1933, Suggestions for prospecting in the Alma District, Colorado: Colorado Scientific Society Proceedings, v. 13, no. 4, p. 89-131.

Singewald, Q.D., and Butler, B.S., 1941, Ore deposits in the vicinity of the London Fault of Colorado: U.S. Geological Survey Bulletin 911, 74 p.

Sinkankas, John, 1959, Gemstones of North America, XV: Princeton, N.J., Van Nostrand Co., 675 p.

Slack, J.F., 1980, Multistage vein ores of the Lake City District, western San Juan Mountains, Colorado: Economic Geology, v. 75, no. 7, p. 963-991.

Slebir, E.J., 1957, The geology of the North Cement Creek area, Gunnison County, Colorado: Colorado School of Mines, Golden, Colo., M.S. Thesis, 93 p.

40

Smith, L.E., and Baker, K.E., 1951, Uranium in Fall River area, Clear Creek County, Colorado: U.S. Atomic Energy Commission RMO-913, p. 5

Snyder, G.L., Hopkins, R.T., Jr., Domenico, J.A., Frisken, J.G., and Mitchell, J., 1981, Analyses of rock and stream sediment samples from the Mount Zirkel Wilderness and northern Park Range vicinity, Jackson and Routt Counties, Colorado: U.S. Geological Survey Open-File Report 81-186, 85 p.

Soister, P.E., 1968, Geologic map of the Coral Bluffs quadrangle, El Paso County, Colorado: U.S. Geological Survey Geologic Quadrangle Map GQ-783, scale 1:24,000.

Soule, J.H., 1956, Reconnaissance of the Red Bed Copper Deposits in southeastern Colorado: U.S. Bureau of Mines Information Circular 7740.

Spencer, A.C., 1903, Reconnaissance examination of the copper deposits at Pearl, Colorado, in Contributions to Economic Geology, 1902: U.S. Geological Survey Bulletin 213, p. 163-169.

Spencer, F.D., 1961, Bedrock geology of the Louisville quadrangle, Colorado: U.S. Geological Survey Geologic Quadrangle Map GQ-151, scale 1:24,000.

Spock, L.E., Jr., 1928, Geological reconnaissance of parts of Grand, Jackson, and Larimer Counties, Colorado: Annals of the New York Academy of Science, v. 30, p. 256-257.

Spurr, J.E., 1898, Geology of the Aspen District, Colorado: U.S. Geological Survey Monograph 31, 260 p.

Spurr, J.E. Garrey, G.H., and Ball, S.H., 1908, Economic geology of the Georgetown quadrangle (together with the Empire District), Colorado: U.S. Geological Survey Professional Paper 63, 422 p.

Staatz, M.H., and Trites, A.F., 1955, Geology of the Quartz Creek Pegmatite District, Gunnison County, Colorado: U.S. Geological Survey Professional Paper 265, 111 p.

Staatz, M.H., Armbrustmacher, T.J., Olson, J.C., Brownfield, I.K., Brock, M.R., Lemons, J.F., Jr., Coppa, L.V., and Clingan, B.V., 1979, Principal thorium resources in the United States: U.S. Geological Survey Circular 805, 42 p.

Steven, T.A., 1960, Geology and fluorspar deposits, Northgate District, Colorado: U.S. Geological Survey Bulletin 1082-F, p. 323-422.

Steven, T.A., 1964, Geologic setting of the Spar City District, San Juan Mountains, Colorado, in Geological Survey Research 1963; Short papers in the geology and hydrology, articles 122-172: U.S. Geological Survey Professional Paper 475-D, p. D123-D127.

Steven, T.A., and Bieniewski, C.L., 1977, Mineral resources of the La Garita Wilderness, San Juan Mountains, southwestern Colorado, with a section on Geophysical Interpretation by G.P. Eaton: U.S. Geological Survey Bulletin 1420, 65 p.

41

Steven, T.A., and Lipman, P.W., 1973, Geologic map of the Spar City quadrangle, Mineral County, Colorado: U.S. Geological Survey Geologic Quadrangle Map GQ-1052, scale 1:24,000.

Steven, T.A., and Ratté, J.C., 1960, Geology and ore deposits of the Summitville district, San Juan Mountains, Colorado: U.S. Geological Survey Professional Paper 343, 70 p.

Steven, T.A., and Ratté, J.C., 1965, Geology and structural control of ore deposition in the Creede District, San Juan Mountains, Colorado: U.S. Geological Survey Professional Paper 487, 90 p.

Steven, T.A., Lipman, P.W., Fisher, F.S., Bieniewski, C.L., and Meeves, H.C., 1977, Mineral resources of study areas contiguous to the Uncompahgre Primitive Area, San Juan Mountains, southwestern Colorado: U.S. Geological Survey Bulletin 1391-E, p. E1-E126.

Steven, T.A., Lipman, P.W., Hail, W.J., Jr., Barker, Fred, and Luedke, R.G., 1974, Geologic map of the Durango quadrangle, southwestern Colorado: U.S. Geological Survey Miscellaneous Investigations Series Map I-764, scale 1:250,000.

Steven, T.A., Schmitt, L.J., Jr., Sheridan, M.J., and Williams, F.E., 1969, Mineral resources of the San Juan Primitive Area, Colorado, with a section on Iron resources in the Irving Formation, J.E. Bair and Harry Klemic: U.S. Geological Survey Bulletin 1261-F, p. F1-F187.

Stoddard, B.H., 1932, Mica, in Mineral Resources of the United States; calendar year 1929: U.S. Geological Survey, pt. 2 (non-metallic), p. 373-388.

Stone, J.B., 1934, Limonite deposits at the Orient Mine, Colorado: Economic Geology, v. 29, no. 4, p. 317-329.

Taylor, R.B., 1974, Reconnaissance geologic map of the Deer Peak quadrangle and southern part of the Hardscrabble Mountain quadrangle, Custer and Huerfano Counties, Colorado: U.S. Geological Survey Miscellaneous Investigations Series Map I-870, scale 1:24,000.

Taylor, R.B., and Scott, G.R., 1973, Reconnaissance geologic map of the Wetmore Quadrangle, Custer and Pueblo Counties, Colorado: U.S. Geological Survey Mineral Investigations Field Studies Map MF-548.

Taylor, R.B., Scott, G.R., and Wobus, R.A., 1975, Reconnaissance geologic map of the Howard quadrangle, central Colorado: U.S. Geological Survey Miscellaneous Investigations Series Map I-892, scale 1:62,500.

Taylor, R.B., Scott, G.R., Wobus, R.A., and Epis, R.C., 1975, Reconnaissance geologic map of the Cotopaxi 15-minute quadrangle, Fremont and Custer Counties, Colorado: U.S. Geological Survey Miscellaneous Investigations Series Map I-900, scale 1:62,500.

42

Taylor, R.B., Scott, G.R., Wobus, R.A., and Epis, R.C., 1975, Reconnaissance geologic map of the Royal Gorge quadrangle, Fremont and Custer Counties, Colorado: U.S. Geological Survey Miscellaneous Investigations Series Map I-869, scale 1:62,500.

Temple, A.K., and Grogan, R.M., 1965, Carbonatite and related alkalic rocks at Powderhorn, Colorado: Economic Geology, v. 60, no. 4, p. 672-692.

Theobald, P.K., and Chew, R.T., III, 1955, Geology and uranium deposits of part of the Browns Park Formation, Colorado, Wyoming, and Utah -- A Preliminary Report: U.S. Geological Survey Trace Elements Investigations Report TEI-423, 39 p.

Thompson, J.V., 1983, Economic potential of the carbonatite and alkalic stock at Powderhorn, Gunnison County, Colorado, in Handfield, R.C., eds., Gunnison Gold Belt and Powderhorn Carbonatite Field Trip Guidebook: Denver Region Exploration Geologists Society, p. 32-42.

Thompson, M.E., Roach, C.H., and Meyrowitz, Robert, 1956, Duttonite, new vanadium mineral from Peanut Mine, Montrose County, Colorado: Science, v. 123, no. 320, p. 990.

Thurston, W.R., 1955, Pegmatites of the Crystal Mountain District, Larimer County, Colorado: U.S. Geological Survey Bulletin 1011, 185 p.

Townsend, D.R., and Tompkin, J.M., 1951, Preliminary map showing geology and construction materials of the Wray no. 3 and Wray no. 4 Quadrangles, Colorado-Nebraska: U.S. Geological Survey Open-File Report 51-11.

Trammell, J.W., 1961, Geology of the Cumberland Pass area, Gunnison County, Colorado: University of Colorado, Boulder, Colo., M.S. Thesis, 109 p.

Traver, W.M., Jr., 1947, Investigations of strategic mineral resources, in Vanderwilt, J.W., Mineral resources of Colorado: Denver, State of Colorado Mineral Resources Board, p. 471-496.

Trimble, D.E., and Machette, M.N., 1979, Geologic map of the Colorado Springs-Castle Rock area, Front Range Urban Corridor, Colorado: U.S. Geological Survey Miscellaneous Investigations Series Map I-857-F.

Trimble, D.E., and Machette, M.N., 1979, Geologic map of the Greater Denver area, Front Range Urban Corridor, Colorado: U.S. Geological Survey Miscellaneous Investigations Series Map I-856-H.

Tweto, Ogden, 1956, Geologic map of the Tennessee Pass area, Eagle and Lake Counties, Colorado: U.S. Geological Survey Mineral Investigations Field Studies Map MF-34, scale 1:14,400.

Tweto, Ogden, 1960, Scheelite in the Precambrian gneisses of Colorado: Economic Geology, v. 55, p. 1406-1428.

43

Tweto, Ogden, 1976, Geologic map of the Craig 1° X 2° quadrangle, northwestern Colorado: U.S. Geological Survey Miscellaneous Investigations Series Map I-972, scale 1:250,000.

Tweto, Ogden, 1977, Nomenclature of Precambrian rocks of Colorado: U.S. Geological Survey Bulletin 1422-D, 22 p.

Tweto, Ogden, Bryant, Bruce, and Williams, F.E., 1970, Mineral resources of the Gore Range-Eagles Nest Primitive Area and vicinity, Summit and Eagle Counties, Colorado: U.S. Geological Survey Bulletin 1319-C, p. C1-C127.

Tweto, Ogden, Moench, R.H., and Reed, J.C., Jr., 1976, Preliminary geologic map of the Leadville 1° x 2° quadrangle, northwestern Colorado: U.S. Geological Survey Mineral Investigations Field Studies Map MF-760, scale 1:250,000.

Tweto, Ogden, Moench, R.H., and Reed, J.C., Jr., 1978, Geologic map of the Leadville 1° x 2° quadrangle, northwestern Colorado: U.S. Geological Survey Miscellaneous Investigations Series Map I-999, scale 1:250,000.

Tweto, Ogden, Steven, T.A., Hail, W.J., Jr., and Moench, R.H., 1976, Geologic map of the Montrose 1° x 2° quadrangle, southwestern Colorado: U.S. Geological Survey Mineral Investigations Field Studies Map MF-761, scale 1:250,000.

Umpleby, J.B., 1917, Manganiferous iron ore occurrences at Red Cliff, Colorado: Engineering and Mining Journal, v. 104, p. 1140-1141.

Untermann, G.E., and Untermann, B.R., 1954, Geology of Dinosaur National Monument and Vicinity, Utah-Colorado: Utah Geological and Mineralogical Survey Bulletin, v. 42, 228 p.

Van Alstine, R.E., 1947, Fluorspar investigations, in Vanderwilt, J.W., Mineral resources of Colorado: Denver, State of Colorado Mineral Resources Board, p. 457-465.

Van Alstine, R.E., 1969, Geology and mineral deposits of the Poncha Springs NE quadrangle, Chaffee County, Colorado, with a section on Fluorspar mines and prospects by R.E. Van Alstine and D.C. Cox: U.S. Geological Survey Professional Paper 626, 52 p.

Van Alstine, R.E., 1974, Geology and mineral deposits of the Poncha Springs SE quadrangle, Chaffee County, Colorado: U.S. Geological Survey Professional Paper 829, 19 p.

Van Alstine, R.E., and Cox, D.C., 1969, Fluorspar mines and prospects, in Van Alstine, R.E., Geology and Mineral Deposits of the Poncha Springs NE Quadrangle, Chaffee County, Colorado: U.S. Geological Survey Professional Paper 626.

Van Diest, E.C., and Van Deist, P.H., 1898, Notes on the geology of the Western Slope of the Sangre De Cristo Range in Costilla County, Colorado: Colorado Scientific Society Proceedings, v. 5, p. 76-80.

44

Van Diest, P.H., 1888, Colorado volcanic craters: Colorado Scientific Society Proceedings, v. 3, p. 19-23.

Van Horn, Richard, 1957, Bedrock geology of the Golden quadrangle, Colorado: U.S. Geological Survey Geologic Quadrangle Map GQ-103, scale 1:24,000.

Van Horn, Richard, 1972, Surficial and bedrock geologic map of the Golden quadrangle, Jefferson County, Colorado: U.S. Geological Survey Miscellaneous Investigations Series Map I-761-A, scale 1:24,000.

Van Sant, J.N., 1959, Refractory-clay deposits of Colorado: U.S. Bureau of Mines Report of Investigations 5553, 156 p.

Vanderwilt, J.W., 1938, Geology and mineral deposits of the Snowmass Mountain area, Gunnison County, Colorado: U.S. Geological Survey Bulletin 884, 184 p.

Vanderwilt, J.W., 1947, Mineral resources of Colorado: Denver, State of Colorado Mineral Resources Board, 547 p.

Varnes, D.J., 1962, Analysis of plastic deformation according to Von Mises' theory with application to the South Silverton area, San Juan County, Colorado: U.S. Geological Survey Professional Paper 378-B, p. B1-B49.

Varnes, D.J., 1963, Geology and ore deposits of the South Silverton mining area, San Juan County, Colorado: U.S. Geological Survey Professional Paper 378-A, p. A1-A56.

Varnes, H.D., and Larrabee, D.M., 1946, Preliminary map showing sand and gravel deposits of Colorado: U.S. Geological Survey Missouri Basin Studies MB-2.

Vhay, J.S., 1962, Geology and mineral deposits of the area south of Telluride, Colorado, in Contributions to Economic Geology 1959: U.S. Geological Survey Bulletin 1112-G, p. 209-310.

Vhay, J.S., and Varnes, D.J., 1943, Preliminary report on molybdenum prospects, Ophir Valley, San Miguel County, Colorado: Unpublished Report.

Vine, J.D., 1974, Geologic map and cross sections of the La Veta Pass, La Veta and Ritter Arroyo Quadrangles, Huerfano and Costilla Counties, Colorado: U.S. Geological Survey Miscellaneous Investigations Series Map I-833.

Voegeli, P.T., Sr., and King, R.U., 1969, Occurrence and distribution of molybdenum in the surface water of Colorado: U.S. Geological Survey Water-Supply Paper 1535-N, p. N1-N32.

Waage, K.M., 1946, Fire clay deposits of eastern Fremont, western Pueblo and adjacent counties, Colorado: Princeton University, Princeton, N.J., Ph.D Thesis, 171 p.

45

Waage, K.M., 1953, Refractory clay deposits of south-central Colorado: U.S. Geological Survey Bulletin 993, 104 p.

Waage, K.M., 1961, Stratigraphy and refractory clay rocks of the Dakota Group along the northern Front Range, Colorado: U.S. Geological Survey Bulletin 1102, 154 p.

Waage, K.M., undated, Stone City area, Turkey Creek fire clay district, Pueblo County, Colorado: .

Wahlstrom, E.E., 1935, The minerals of the White Raven Mine, Ward, Colorado: American Mineralogist, v. 20, no. 5, p. 377-383.

Wahlstrom, E.E., 1956, Petrology and weathering of the Iron Dike, Boulder and Larimer Counties, Colorado: Geological Society of America Bulletin, v. 67, no. 2, p. 147-163.

Wallace, S.R., MacKenzie, W.B., Blair, R.G., and Muncaster, N.K., 1978, Geology of the Urad and Henderson molybdenite deposits, Clear Creek County, Colorado, with a section on A comparison of these deposits with those at Climax, Colorado: Economic Geology, v. 73, no. 3, p. 325-368.

Wallace, S.R., Muncaster, N.K., Jonson, D.C., MacKenzie, W.B., Bookstrom, A.A., and Surface, V.E., 1968, Multiple intrusion and mineralization at Climax, Colorado, in Ridge, J.D., ed., Ore Deposits of the United States, 1933-1967, The Graton-Sales Volume: New York, American Institute of Mining, Metallurgical, and Petroleum Engineers, Inc., Volume I, p. 605-640.

Warne, J.D., and Everett, F.D., 1953, Investigation of the Boulder County tungsten district, Boulder County, Colorado: U.S. Bureau of Mines Report of Investigations 4973, 30 p.

Warner, L.A. Cameron, E.N. Holser, W.T., and Wilmarth, V.R., 1959, Occurrence of non-pegmatite beryllium in the United States: U.S. Geological Survey Professional Paper 318, 198 p.

Weeks, A.D., and Thompson, M.E., 1954, Identification and occurrence of uranium and vanadium minerals from the Colorado plateaus: U.S. Geological Survey Bulletin 1009-B, p. 13-62.

Weir, G.W., Carter, W.D., Puffett, W.P., and Gualtieri, J.L., 1960, Priliminary geologic map of the Mount Peale 4 NE quadrangle, San Juan County, Utah, and Montrose and San Miguel Counties, Colorado: U.S. Geological Survey Mineral Investigations Field Studies Map MF-150, scale 1:24,000.

Wells, and Others, 1952, Beneficiation of oxide manganese ores from Arapahoe, Douglas, Saguache, Custer, Chaffee, and Park Counties, Colorado: U.S. Bureau of Mines Report of Investigations 4845, p. 3-6.

Wells, J.D., 1960, Petrography of radioactive Tertiary igneous rocks, Front Range Mineral Belt, Colorado: U.S. Geological Survey Bulletin 1032-E, p. 223-272.

46

Wells, J.D., 1967, Geology of the Eldorado Springs quadrangle, Boulder and Jefferson Counties, Colorado: U.S. Geological Survey Bulletin 1221-D.

Wells, J.D., and Harrison, J.E., 1954, Radioactivity reconnaissance of part of north-central Clear Creek County, Colorado: U.S. Geological Survey Circular 345, 9 p.

White, D.E., 1962, Antimony in the United States, exclusive of Alaska and Hawaii: U.S. Geological Survey Mineral Investigations Resource Map MR-20, scale 1:3,168,000.

Whitebread, D.H., 1951, Geology of the Pitkin area, Gunnison County, Colorado: University of Colorado, Boulder, Colo., M.S. Thesis, 37 p.

Williams, A., Jr., 1883, Mineral Resources of the United States; calendar year 1882: U.S. Geological Survey, 813 p.

Williams, P.L., 1964, Geology, structure, and uranium deposits of the Moab quadrangle, Colorado and Utah: U.S. Geological Survey Miscellaneous Investigations Series Map I-360, scale 1:250,000.

Wilmarth, V.R., 1959, Geology of the Garo uranium-vanadium Copper Deposit, Park County, Colorado: U.S. Geological Survey Bulletin 1087-A, 21 p.

Wilson, A.B., and LaRock, E.J., 1991, ASCII database for principal lode mines and mineralized areas in southern Summit County, Colorado: U.S. Geological Survey Open-File Report 91-27.

Withington, C.F., 1955, Geology of the Paradox quadrangle, Colorado: U.S. Geological Survey Geologic Quadrangle Map GQ-72, scale 1:24,000.

Withington, C.F., 1955, Preliminary geologic map of the Paradox quadrangle, Colorado: U.S. Geological Survey Mineral Investigations Field Studies Map MF-22, scale 1:24,000.

Wobus, R.A., and Epis, R.C., 1978, Geologic map of the Florissant 15-minute Quadrangle, Park and Teller Counties, Colorado: U.S. Geological Survey Miscellaneous Investigations Series Map I-1044.

Wobus, R.A., and Scott, G.R., 1977, Reconnaissance geologic map of the Woodland Park quadrangle, Teller County, Colorado: U.S. Geological Survey Mineral Investigations Field Studies Map MF-842, scale 1:24,000.

Wobus, R.A., Epis, R.C., and Scott, G.R., 1979, Geologic map of the Cover Mountain Quadrangle, Fremont, Park, and Teller Counties, Colorado: U.S. Geological Survey Miscellaneous Investigations Series Map I-1179.

Wolfe, J.A., 1953, Geology of the Masonville Mining District, Larimer County, Colorado: Colorado School of Mines, Golden, Colo., M.S. Thesis T-789, 110 p.

47

Woodruff, E.G., 1912, The coal resources of Gunnison Valley, Mesa and Delta Counties, Colorado, in Campbell, M.R., Contribution to Economic Geology 1910; Part II.)Mineral fuels: U.S. Geological Survey Bulletin 471, p. 565-573.

Worcester, P.G., 1919, Molybdenum deposits of Colorado with notes on the molybdenum industry: Colorado Geological Survey Bulletin 14, 131 p.

Worcester, P.G., 1921, The geology of the Ward Region, Boulder County, Colorado: Colorado Geological Survey Bulletin 21, 74 p.

Wright, R.J., and Everhart, D.L., 1960, Uranium, in del Rio, S.M., Mineral resources of Colorado, 1st sequel: Denver, State of Colorado Mineral Resources Board, p. 357-359.

Yeend, W.E., 1969, Quaternary geology of the Grand and Battlement Mesas area, Colorado: U.S. Geological Survey Professional Paper 617, 50 p.

Young, E.J., 1977, Geologic, radiometric, and mineralogic maps and underground workings of the Schwartzwalder Uranium Mine and area, Jefferson County, Colorado: U.S. Geological Survey Open-File Report 77-725, 38 p.

Young, E.J., and Sims, P.K., 1961, Petrography and origin of xenotime and monazite concentrations, Central City district, Colorado: U.S. Geological Survey Bulletin 1032-F, p. 273-297.

48