lAbhrevialioiis: ASAPK, Astrogeologic Studies Annunl Progress Report; ASSPR, Astrogeo1~1gic Studiea Seiiii~irinu~il Prof^ress lieport.; 1,?S, Lunar and I'humtary Science (Abstracts of Papers Subinitted to Lunar :mci Phmetary Science Conferences); LI'SCI', Lunar imd Pliineiary Sci- ence Conference Proceedings; LS, Lunar Science (Abstriicts of l'i~pers Submitted to Lumir Science Conferences); LSCI', Lunar Science Con- fcrence l'roceedizigs; NASA, U.S. Niitioniil Avronmtics and Spiiec Atimiiiistri~tion; USGS, U.S. Geological Survey I

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Boyce, J.M., 1976, Ages offlow units in the lunar nearside maria based on Lunar Orbiter IV photographs: LSCI' 7, v. 3, p. 2717-2728.

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Boyce, J.M., and Johnson, D.A., 1977, Ages of flow unit,s in Mare Crisium based on crater density: LSCP 8, v. 3, p. 3495-3502.

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283

THE GEOLOGIC HISTORY OF THE MOON

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Car r M.H., and'ritley, S.R., 1969, Geologic map ofthe Maestlin G region of the Moon, Lunar Orbiter site I1 P-13, Oceanus Procellarum, including Apollo landing site 5: USGS Mill) 1-622 [ORB 11-13 (10011, scale 1:100,000.

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Chapman,C.It.,Aubele, J.C., Roberts, W.J., andCutts, J.A., 1979, Sub-kiloineter lunar craters: Origins, ages, processes of de- &Tadation, and implications for mare basalt petrogenesis 1abs.j: LPSX, pt. 1, p. 190-191.

Charette, M.13., McCord, T.13., Pieters, C.M., and Adams, J.B., 1974, Application of remote spectral reflectance measure- ments to lunar geology classification and determination of titanium content of lunar soils: Journal of Geophysical Research, v. 79, no. 11, p. 1605-1613.

Cintala, M.J., Head, J.W., 111, and Veverka, Joseph, 1978, Charac- teristics of the cratering process on small satellites and asteroids: LPSCP 9, v. 3, p. 3803-3830.

Cintala, M.J., Wood, C.A., and Head, J.W., 1977, The ell'ects of target characteristics on fresh crater morphology: Prelimi- nary results for tile moon and Mercury: LSCP 8, v. 3, p. 3409-3425.

Clark, P.E., and Hawkc, B.R., 1981, Compositional variation in the I-iadley Apennine region: LI'SCI' 12, pt. B, see. 1, p. 727-749.

Clayton, R.N., and Mayeda, T.K., 1975, Genetic relations between the moon and meteorites: LSCP 6, v. 2, p. 1761-1769.

Cliff, R.A., Lee-Hu, C., and Wetherill, G.W., 1971, Itb-Sr and U, Th-Pb n~ei is~reinents on Apollo 12 materials: LSC13 2, v. 2, p. 1493-1502.

Colton, G.W., Howard, K.A., and Moore, H.J., 1972, Mare ridges and arches in southern Oceanus lJrocellarutn, pt. S o/'IJho- togeology, [chap.] 29 of Apollo 16 preliminary science report: NASA Report SP-315, p. 29-90 to 29-93.

Compston, W., Berry, H., Vernon, M.J., Cliappcll, B.W., and Kayc, M., 1971, Rubidium-strontium chronology imd chemistry of lunar material from the Ocean of Storms: LSCI' 2, v. 2, p. 1471-1-185.

Compston, W., Foster, J.J., and Gray, C.M., 1975, ltb-Sr ages of dusts within boulder 1, station 2, Apollo 17: The Moon, v. 14, no. 3-4, p. 445-462.

Compston, W., Vernon, M.J., Berry, H., Rudowski, R., Gray, C.M., Ware, N.G., Chappell, B.W., and Kaye, M.J., 1972, Apollo 14 mineral ages and the thermal history of the Fra Mauro I%r- mation: LSCP 3, v. 2, p. 1487-1501.

Conca, James, and I-Iubhard, N.J., 1979, Evidence for early vol- canism in Mare Smythii: LPSCP 10, v. 2, p. 1727-1737.

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Crater Analysis 'Ibchniques Working Group, 1979, Standard techniques for presentation and analysis of crater size-fre- quency data: Icarua, v. 37, no. 2, p. 467-474.

Croft, S.K., 1978, Lunar crater volumes: Int,erpretation by mod- els ofimpact cratering and upper crustal structure: Ll'SCI'9, v. 3, p. 3711-3733.

-1980, Cratering flow fields: Implications for the excavation and transient, expansion stages of crater formation: LI'SCI' 11, v. 3, p. 2347-2378.

-1981, The modification stage of basin formation: Condi- tions of ring formntion, ià Multi-ring hasins: LI3SC1' 12, pi. A, p. 227-257.

Cro.'.uz, Ghislaine, 1977, The irradiation history ofthe lunar soil: Physics and Chemistry of the Eiirt~li, v. 10, no. 3, p. 197-214.

Crozaz, Ghislaine, llrozd, K.J., Hohenberg, C.M., Hoyt, I-I.I?, Ragan, D., Walker, R.M., iind Yiihns, D., 1972, SoLir flare and gnliictic cosmic ray studies ofApollo 14 and 15 samples: LSCP 3, v. 3, p. 2917-2931.

Cruikshank, D.I'., and Wood, C.A., 1972, Lunar rilles and Hawaiian volcanic features: Possible analogues: The Moon, v. 3, no. 4, p. 412-446.

Cumniings, David, 1971, Geologic map of the Wiclimann CA region of the Moon, Lunar Orbiter site 111 1'-11, Oceanus Procdlarum, including Apollo landing sites 4 and 4R: USGS Map 1-624 [ORB 111-P11(110)1, scale 1:100,000.

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De I-Ion, R.A., and Wnsltom, J.D., 1976, Geologic structure of the eastern mare basins: LSCP 7, v. 3, p. 2729-2746.

Ue Laeter, J.R., Vernon, M.J., and Conipston, W., 1973, Revision of lunar Rb-Sr ages: Geochimica et Cosriiochiinica Ada , v. 37, no. 3, p. 700-702.

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Dennis, J.G., 1971, l2ie.s structure, southern Germany, a review: Journal of Geophysical Research, v. 76, no. 23, p. 5394-5406.

De Paolo, D.J., McCulloch, M.T., I'apa~iiistassiou, D.A., l-Iuneke, J.C., and Wasserburg, G.J., 1978, Ages, evolution and neutron efl'ects of Luna 24 samples 1nbs.I: LI'S IX, p. 2"14-246.

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IL, 1976, Meteorite-free Apollo 15 crystalline KREEP: LSCP 7, v. 2, p. 1833-1844.

Dowty, Eric, I'rinz, Martin, and Keil, Klaus, 1974a, Ferroan anorthosite: A widespread and distinct,ive lunar rock type: Earth and I'ltmetin'y Science Letters, v. 24, no. 1, p. 15-25.

-1974b, "Very high aluniina basalt": A mixture and not a magma type: Science, v. 183, no. 4130, p. 1214-1215.

Dreibus, Gerlind, Kriise, I%, Spettel, B., and Wa~ik~?, H., 1977, The bulk composition of the moon and the eiicrite parent body: LSCP 8, v. 1, p. 211-227.

Drozd, R.tl., Hohenhcrg, C.M., Morgan, C.J., 130dosel~, FA., iind Wroge, M.L., 1977, Cosmic-ray exposure hist,ory at 'Ihiirus- Littrow: LSCP 8, v. 3, p. :!027-3043.

Drozd, R.J., I-lohenherg, C.M., Morgan, C.J., and I&ilston, C.E., 1974, Cosmic-ray exposure history tit the Apollo 16 and other luniir sites: Lunar surface dynaniics: Geochiniica et Cos- inochimica Ada, v. 38, no. 10, p. 1625-1642.

1)unciin. AIL, Grieve, R.A.I"., ancl Wcill, D.1':, 1975, The life and times of Big Bertha: Lunar breccia 14321: Geochimica (it Cosn~ochimica Ada, v. 39, no. 3, p. 265-273.

Dvorak, John, and Phillips, R.J., 1978, Lunar Houguer griivity anoinaiies: Imbrian iigc craters: Ll'SCP4), v. 3, p. t'i651-3668.

-1979, Gravit,y anomaly and st,ructure associated with the La~nonl, region ofthe moon: LPSCP 10, v. 3, p. 2265-2275.

Dymek, R.I"., Alhee, A.L., iind Chodos, A.A., 1975, Comparative petrology of lunar cumulate rocks of possible primary origin: Dunitc 72415, troct,olite 76535, norite 78235, and anorthosite 62237: LSCP 6, v. 1, p. :K)l-;i41.

-1976, Pt!trolo&y and origin of Boulders #2 and #:l, Apollo 17 Stiit,ion 2: LSCP 7, v. 2, p. 2335-2378.

Eherhardt, P., Geiss, J., Graf: I-I., Gri~gler, N., Kriihenbuhl, U., Schwaller, I-I., Scliwarzmullur, J., and Stettler, A,, 1970, Cor- relation between rock type and irradiation history ofApollo 11 igneous rocks: Earth and IJkmetiiry Science Letters, v. 10, no. 1, p. 67-72.

Eherhnrdt, P., Geiss, J., Grdgler, N., Maurer, P., ancl Stet8tler, A,, 197:Jii, :'"Ar-'IOAr ilia's ofluiii'ir nii'itcriiil /iihs. 1: Met.coritics, v. 8, no. 4, p. 360-361.

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Eggleton, It. I?., 1964, I'reliniinary geology ofthe Itipliaeus quad- rangle of the Moon and definition of the Fra Mauro I?orma- Lion: USGS ASAI'IZ, August 25,1962 to July 1,1963, pi. A, p. 46-63.

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Eggleton, R.E., and Marshall, C.H., 1962, Not,es on the Apenni- niiin Series and pre-Imbrian stratigraphy in the vicinity of Mare Humorurn and Mure Nuhium: USGS ASSI'R, Februiiry 26,1961 to August, 24,1961, p. 132-137.

Eggleton, R.E., and Offield, 'S.W., 1970, Geologic maps ofthe Fra Mauro region of the Moon: Apollo 14 premission mops: USGS Map 1-708, scales 1:250,000, 1:25,000, 2 sheds.

Eggleton, R.E., and Schaber, G.G., 1972, Cayley Formotion inter- preted as basin ejecta, pi. 13 of I'hotogeology, Ichap.1 29 of Apollo 16 preliminary science report: NASA Report S1'-315, p. 29-7 to 29-16.

Eggloton, R.E., Sclial~er, G.G., and Pike, R.J., 1974, I'hotogcologic detection ofsurfaces buried by mare b~salt,s labs.J: LS V, pt. 1, p. 200-202.

Eichhorn, G., McGtie, J.J., James, 0. B., micl Schueffei; O.A., 1979, Consortium breccia 73255: Laser :'~'Ar-""Ar dating of itphanite ssunples: LPSCP 10, v. 1, p. 763-788.

lil-Baz, Faroul~, 1972, The Alhazen to Ahul Wafa swirl belt: An extensive field of light.-colored, sinuous n~arltings, pt. T of Photogeology, [chap. 1 29 of Apollo 16 prelin~iniiry science report: NASA f<(!pOI't S13-915, p. 29-93 to 29-97.

El-Baz, Farouk, and Itoosa, S.A., 1972, Significant results from Apollo 14 lunar orbital photography: LSCP 3, v. 1, p. 63-83.

El-Bar, Faroulc, Worden, A.M., and Brand, V.Il., 1972, Astronaut observations from lunar orbit and their geologic significance: LSCI' 3, v. 1, p. 85-10-1.

Eliason, K.M., and Soderhlom, LA., 1977, An array processing system for lunar pocheiiiicul mid geophysic;>l data: LSCP 8, v. I , p. 1163-1 170.

Elston, D.11, 1972, Geologic map of the Colonibo quiitlrangle of the Moon: USGS Map 1-714 (LAC-79), scale 1:1,000,000.

Engelliiirdt, Wolfvon, 1967, Neue l3eobachtungen im Nbrdlinger Ries /New observations in the NGrdlingen RiesI: (leologische Rundschau, v. 57, no. 1, p. 165-188.

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Engchuxlt, Wolf von, and Stengelin, Rudolf, 1979, Normative composition and classification of lunar igneous rocks and glasses, I. Lunar igneous rocks: Earth and Planetary Science Letters, v. 42, no. 2, p. 213-222.

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Floran, R.J., Grieve, R.A.F., I'liinney, W.C., Warner, J.L., Simonds, C.H., Blancliard, D.P., and Dunce, M.R., 1978, Man- icouagan impact melt, Quebec [Canada), 1, stratigraphy, petrology, and clieniistry: Journal ofGeophysical Research, v. 83, no. B6, p. 2737-2759.

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Freeman, V.F., 1981, Regolith of the Apollo 16 site, Ichap.l IF of Ulrich, G.E., Hodges, C.A., and Muchlberger, W.R., eds., Geology of the Apollo 16 area, central lunar highlands: USGS I'rofessioniil I'uper 1048, p. 147-159.

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Morphology of Lonar Crater, India: Comparisons and implications: The Moon and the Planets, v. 23, no. 4, p. 493-515.

Gaffney, E.S., 1978, EfTects of gravity on explosion craters: LPSC13 9, v. 3, p. 3831-3842.

Gall, Horst, Miiller, Dieter, and Stdffler, Dieter, 1975, Verieiluiig, Eigensciiaften und ICntst,ehung der Auswurfs~nussen des Iinpaktkruters N6rdlinger Ries [Distribution, properties, and origin ofthe e.jecta of the Nordlingen Ries impact crater]: Geologische Rundschaa, v. 64, p. 915-947.

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Gault, D.E., and Moore, H.J., 1965, Scaling relationships for microscale to megascale inipact craters: Symposium on Hypervelocity In i~ac t , 7th,'I\inipa, Fin., 1964, Proceedings, v. 6, p. 341-351.

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Gault, D.Ii., Adarns, J.B., Collins, R.J., Kuiper, G.P., Masursky, Harold, O'IGefe, J.A., I'hinney, R.A., and Shoemaker, E.M., 1968a, Lunar theory and processes, Ichap. 19 orSurveyor VlI mission report. Part 11. Science resulh: I'astidenii, California Institute of'lkchnology, Je t Propulsion Labowtory 'lbc11nic;il Report 32-1264, p. 267-313.

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-- 1971, Evolution of mare surface: LSCP 2, v. 3 , p.

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THE GEOLOGIC HISTORY OF THE MOON

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Head, J.W., 1972, Small-scale analogs of the Cayley Formation and Descurtes Mountains in impact-associated deposits, pt. C of Photogeoloi^y, Ic11ap.l 29 of ApoHo 16 preliminary science report: NASA Report SIJ-315, p. 29-16 Lo 29-20. - 1974a, Lunar dark-mantle deposits: I'ossihle clues to the

distribution ofearly mare deposits: LSC1'5, v. 1, p. 207-222. - 19741), Morphology and structure of the 'l'durus-Liltrow

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thickness, and volumes of flooded impact basins labs.1: 1J'S X, pl. 2, p. 516-518. - 1979b, Lava flooding ofearly planetary crusts: Geometry,

thickness, and volumes of flooded luntir highl:ind terrain labs.]: LI'S X, pt. 2, p. 519-521. - 1979~. Serenitat,is ~iiulti-ringed biisin: IIegional geology

and basin ring interpretution: 'rile Moon and the Planets, v. 21, no. 4, p. 439-462.

Head, J.W., and Clifford, Ann, 1980, Lunar mare donu*s: Classi- ficaiion and modes oforigin: The! Moon and the Planets, v. 22, no. 2, p. 235-258.

Head, J.W., and Goctz, A.F.H., 1972, Descartes region: Evidence for Copernic~in-itge volcanism: Journal of Geophysic~i! Research, v. 77, no. 8, p. 1368-1974.

Head, J.W., and I-Iawke, B.R., 1975, Geology of the Apollo 14 region ( I h Mauro): Stratigraphic history and sample prove- nance: LSCIJ 6, v. 3, p. 2-183-2501.

Head, J.W., and McCord, T.B., 1978, Imhrian-ngc l i i ~ i l a n d vol- canism on the Moon: The Gruithuisen :mcl Mairiin do111f.w: Science, v. 199, no. 4336, p. 1-133-1436.

Head, J.W., and Wilson, Lionel, 1979, Alphonsus-l.ype dark-hulo craters: Morphology, mor1)liometry and eruption conditions: LPSCI' 10, v. 3, p. 2861-2897.

Head, J.W., Adams, J.H., McCord, 'S.B., Pieters, C.M., aiid Zisk, S.H., 1978~1, Regional stratigraphy and geologic history of Mare Crisium, in Lunar and I'lanetiiry Institute, compiler, More Crisium: The view from Lurii'i 24: Conference on 1~111ii1 24, Houston, Tex., 1977, Proceedings: New York, Perpinion (Geochimica e l Cosi~iochimicu Acta, supp. 91, p. 43-74.

Head, J.W., I'ieters, C.M., McCord, T.B., Adams, J.B., and Zisk, S.H., 19781), Definition und detuiled churacteriziition ofliintir siirface units using remote o1)servations: Iciirus, v. 3 3 , no. 1, p. 145-172.

I-Ic!ud, J.W., Rohi~ison, Edmund, and IJhillips, Roger, 1981, Topography of the Orieutule basin 1til)s.I: LI'S XII, pt. 2, p. 421 -423.

H e d , J.W., Settle, Murk, and Stein, R.S., 1975, Volume of in;it.r- rial e,jected from major lunar basins and implicat,ions for the depth of excavation of lunar samples: LSCP 6, v. 3, p. 2805-2829.

I-leiken, G.H., 1975, Petrology of lunar soils: Reviews of Geophysics and Spiice Physics, v. IS, no. 4, p. 567-587.

I-leiken, G.H., McKay, D.S., and Brown, R.W., 1974, Luniirdcpos- i ts of possible pyroclastic origin: Geochii~iica e l Cos- mochimica Actu, v. 38, no. 11, p. 1703-1718.

Herbert, Floyd, Drake, M.J., Solicit, C.P., and Wiskerchen, M.J., 1977, Some constraints on the thermal history of the lunar i i n p i a ocean: LSCP 8, v. 1, p. 573-582.

I-lertogen, Jan, Janssens, M.-J., 'Ilikaliashi, I-I., Palme, Herbert, and Anders, Edward, 1977, Lunar basins and craters: Evi- dence for systematic coiiipositional changes of bonibiirding population: LSCP 8, v. 1, p. 17-45.

I-Ierzberg, C.T., 1978, The bearing of spinel ciit,iichisites on the crust8-mantle s t ructure of the moon: LI'SCI' 9, v. 1, p. 319-336.

I-Ieraberf C.T., and Baker, M.B., 1980, The cordierite- to spinel- cahclasite transition: Structure of the lunar crust, in Lunar and Planetary Institute, compiler, Conference on the Lunar Highlands Crustp, Houston, 'Ibx., 1979, Proceedings: New York, Pergai~~on iGeoc11imica e l Cosmocliimicsi Ada, supp. 2), p. 113-132.

Mess, P.O., Rutherford, M.J., iind Cuinphell, H.W., 1977, Origin and evolution of LKFM basalt: LSCI' 8, v. 2, p. 2X^-2:373.

I-Iess, W.N., Menzel, D.H., and O'Kcefe, J.A., cds., 1966, The' nature of the lunar surl'ace: Proceedings of the 1965 1AU- NASA Symposium: Baltimore, Johns Hopkins Press, 320 p.

1-Iinners, N.W., 1972, Apollo 16 site selection, Ichup.1 1 ofApollo 16 preliminary science report: NASA Report SP-315, p. 1-1 to 1-3.

-1973, Apollo 17 site select,ion, Ic1iap.l 1 of Apollo 17 pre- liminary science report: NASA Report SP-330, p. 1-1 to 1-5.

I-Iodges, C.A., 1972, Descartes highliinds: Possible analogs around the Orientale Basin, pt. 1) o/'l'lii)togeology, Ichap.1 29 of Apollo 16 preliminary science report: NASA Report SP-315, p. 29-20 to 29-23.

-1973~1, Geologic map of the Langrenus quadrangle of the Moon: USGS Map 1-739 (LAC-801, scale 1:1,000,000.

-19731), Geologic map of Hie I'etavius quadrangle of the Moon: USGS Map 1-794 (LAC-98), scale 1:1,000,000.

Hodges, C.A., and Muehlhergei; W.R., 1981, A summary and critique of geological hypotheses, Ic1iap.l K of Ulrich, G.E., Hodges, C.A., and Muehlberger, W.R., eds., Geology of the Apollo 16 area, central lunnr highlands: USGS I'rofcssio~ial Paper 10-18, p. 215-230.

Hodges, C.A., nnd Willielnis, D.E., 1978, Korin~tion oflunar Imsin rings: Icarus, v. 34, no. 2, p. 294-323,

Hodges, C.A., Muehlberger, W.R., mid Ulricli, G.E., 1973, Geo- logic setting ofApollo Id: LSCI' 4, v. 1, p. 1-25.

I-Iolconib, Robin, 1971,'Ibrraced depressions in lunar inaria: Jour- nal of (:eophysical Research, v. 76, no. 23, p. 570;!-5711.

Holt, H.E., 1974, Geologic map of the l'urbach qiiadr~iiigle of the Moon: USGS Map 1-822 (LAC-%), scale 1:1,000,000.

Hood, L.L., Coleman, P.J., Jr., and Williel~iis, D.E., 1979, Lunar ne~rs ide niagnclic anonialies: LPSCI' 10, v. 3, p. 2235-2257.

Horn, P., Kirslen, T, and Jesshergcr, E.K., 1975, Are there A 12 mare basalts younger than 3.1 b.y. Unsuccessful search for A12 mare basalts with crystallization ages below 3.1 b.y. abs.l: Meteoritics, v. 10, no. 4, p. 417-418.

Horz, Friedrich, 1978, How thick arc lunar miire busalts?: 1,PSCP 9, v. 3, p. 3311-3331.

-1 981, The"I3u11te Breccia" ofthe Ries: Implications for the Apollo 16 site, in James, O.B., and Horz, Friedrich, eds., Workshop on Apollo 16: Houston, Tux., Lunor and I'hinetiiry Institute Technical Report 81-01, p. 53-57.

Horn, Friedrich, and 13anholzer, G.S., Jr., 1980, Deep seated t,urget material in the continuous deposits of the Ries Crater, Germany, in Lunar and Planetary Institute, compiler, Con- ference on the Lunar Highlands Crust, Houston, Tex., 1979, Proceedings: New York, I'ergamon iricochiinica el, Cos- mochimica Acta, supp. 12), p. 211-231.

Horz, Fri[:drich, and Ostertag, Rolf, 1979, The transient, crater of the Ries crater, Ciermany labs.1: LI'S X, pt. 2, p. 570-572.

Howard, K.A., 1970, Mascons, rimre rock and isostasy: Nature, v. 226, no. 5249, p. 924-925.

-1974, Fr(!sli lunar impact craters: Review of variations with size: LSCP 5, v. 1, p. 61-69.

-1975, Geologic map of the crater Copernicus: US(IS Map 1-840, scale 1:250,000.

Howard, K.A., and Masursky, Harold, 1968, Geologic map of tiit' I'tolei~iueus quuclrsi~igle of the Moon: USGS Map 1-566 (LAC-77; RLC-13), scale 1:1,000,000.

Howard, K.A., and Wilsliiro, I-l.G., 1975, Flows of impact melt at. lunar cruters: USGS Journal of Research, v. 3, no. 2, p. 237-257.

Howard, K.A., Cow, M.1-I., and Muehlbcrger, W.R., 1973, Basalt st.rat.igraphy of southern Mare Sereziitatis, pt,. A of Stxat- ignipliic studies, 1chap.l 29 ofApollo 17 preliminary science report: NASA Report, SP-330, p. 29-1 to 29-12.

Howard, K.A., Head, J.W., and Swann, G.A., 1972, Geology of Hudlcy rille: LSCP 3, v. 1, p. 1-14,

Howard, K.A., Wi lhe l~~~s , D.IS., and Scott, D.H., 1974, Lunar basin formaUoii and highland strutigriiphy: ICevirws of Geophysics and Space Physics, v. 12, no. 3, p. 309-327.

I-Iuhbnrd, N.J., 1979, Regioiial chemical vuriatioris in 1un;ir basaltic lavus: IJ'SCP 10, v. 2, p. 1753-1774.

Hubbard, N.J., and Gust,, PW., 1971, Chemical composition and origin of norimare lunar basalts: LSCI' 2, v. 2, p. 999-1020.

I-Iul~hard, N.J., ancl Minear, J.W., 1975, A physical uric1 diumical model ofearly lunar history: LSCI' 6, v. 1, p. 1057-1085.

I~lul~hard, N.J., Meyer, Cliiirles, Jr., Gost, P.W., and Wiesiniinn, Henry, 1971,TheconiposiI,ioii andderivation ofApollo 12soils: liart8h and Planetary Science Lett.ers, v. 10, no. 3, p. 341-350.

I-Iubh~ircl, N.J., Rhodes, J.M., and Gast., P.W., 1973, Chemistry of lunar b;is;ilts with very high alur~iinacontents: Science v. 181, no. 4097, p. 399-942.

I-lllbb~~rd, N.J., Rhodes, J.M., Wieamann, I-I., Shill, C.-Y., und Bansal, B.M., 1974, The chemifiil definition and inter[~ret.a- lion of rock types returned from the non-m:we regions of t,he Moon: LSCP 5, v. 2, p. 1227-1246.

Huhhtird, N.J., Vilas, Faith, and Keith, J.E., 1978, From Serenity to Larigtimalt: A regional chemical set,t,ing for Man; Crisium, it1 Lunar and Planetary Institute, compiler, Mare Crisiuni: The view from Luna 24: Conference on Luna 24, Houston, 'Ilx., 1977, Proceedings: New York, Prrgamon iGeochimica et Cosmocliimicu Acta, supp. 9), p. 13-32.

I-Iuneke, J.C., 1978, ¥'oAr-:is)A microuniilysis of single glass l~nlls i u d 72435 breccia clasts: I,llSCI' 9, v. 2, p. 2345-2362.

I-Iuneke, J.C., and Wasserhurg, G.J., 1975, Trapped ""Ar in troc- t,olit,e 76535 and evidence for enhanced 'iOAr-Â¥'il'A age plateaus lubs.1: LS VI, pi,. 1, p. 417-419.

I-Iunekc, J.C., Jessberger, ILK., Podosek, F.A., iind Wnsserburg, G.J., 1973, ""Ar/^'Ar mei1surements in Apollo 16 and 17 SEUII-

pies and the chronology of~iiel,aniorpliic and volcanic activity in the 'faurus-Littrow region: LSCP 4, v. 2 , ~ ) . 1725-1756.

Huneke, J.C., Jcsshcrgcr, E.K., and Wasserlnirg, G.J., 1974, The age of nidaniorphism of a highland breccia (65015) and a glimpse at the age of its prololit11 1;ihs.l: LS V, pi. I, 1). 375-377.

i-luneke, J.C., lJodosek, l".A., and Wasserburg, G.J., 1972, Gas retention and cosmic-ray exposure ages of a basalt. fnipxient

from Mare Fecunditatis: Earth and Planetary Science Let- ters, v. 13, no. 2, p. 375-383.

I-Iusain, Liaquat, 1974, 'l0Ar-:jBAr chronology and cosmic ray exposure ages of the Apollo 15 stin~ples: Journal of Geophysical Research, v. 79, no. 17, p. 2588-2606.

I-Iusain, Liaqual, and Schaefer, O.A., 1973, Lunar volcanism: Age of the glass in the Apollo 17 orange soil: Science, v. 180, no. 4093, p. 1358-1360.

-1975, Lunar evolution: The first 600 million yeiirs: Geophysical Research Letters, v. 2, no. 1, p. 29-32.

I-Iusain, Liaquat, Sch~effer, O.A., I~~nkliouser, J., tind Sutler, J.F, 1972, The ages of lunar mat.erial from Fra Mauro, Hadley Rille, and Spur Crater: LSCI' 3, v. 2, p. 1557-1567.

Irving, A.J., 1975, Chemical, inineralogical and textural sys- tematics of non-rmn'e melt rocks: Implications for lunar impact and volcanic processes: LSCI' 6, v. 1, p. 363-394.

-1977, Chemical vuriiition and fraclionution of KRKEI' basalt magnm: LSCP 8, v. 2, p. 2433-2448.

Jackson, E.U., 1971, The origiii of uIU'a~nafic rocks by cumulus processes: Fort.scIiritte der Mineralogie, v. 48, no. 1, p. 128-174.

,l;>ckso~i, E.D., Sutlon, ILL., and Wilshire, 1-I.G., 1975, Structure and petrolohy ofa cumulus norite boulder sampled by Apollo 17 in Taurus-Littrow valley, the Moon: Geological Societ,y of An~ericn Bulletin, v. 86, no. 4, p. 433-442.

Jnmes, O.I3., 1972, Lunar anorlhositc 15415:'Ibxturo. ininerology, and n~etai~iorphic history: Science, v. 175, no. 4020, p. 432-436.

-1973, Crystiillizution history of lunar fekispathic basalt 14:ilO: USGS Professional Paper 841, 29 p.

-1976, Petrology of aplianitic lithologies in consortium breccia 73215: LSCP 7, v. 2, p. 2145-2178.

-1977, Lunar highlands breccias geiierat,ccl by major impacts, in l'o~neroy, J.1-I., :ind I-Iubhard, N.J., eds., The Soviet-American Conference on Cosiiioclie~iiislry oftlie Moon and Planets: NASA Report SP-370, p. 637-658.

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-1981, Petrologic mid age relations of the Apollo 16 rocks: I~upliciitioiis for t,he s~ihsurfuce geology and the a g ~ of the Nectaris basin: LIJSCP 12, pi. 13, sec. 1, p. 209-233.

James, O.B., and Horz, Friedrich, eds., 1981, Workshop on Apollo 16: Houston, 'lVx., Lunar zin(l 1'l~nel.ary Institut,e 'leclinicul Report 81-01,157 p.

James, O.K., and Jackson, E.D., 1970, Petrology ofthe Apollo 11 ilnienite iMisults: Jouriial of Geophysical Itcscarch, v. 75, no. 29, p. 5793-5824.

J:imes, O.H., imd McG(!t!, J.J., 1980, Petrology ofimu'e-type b~isalt clasts from consorl.ium breccia 73'2%: LI'SCP 11, v. 1, p. 67-86.

James, O.B., and WrigliL,T.I,., 1972,Apollo 11 and 12 mare basalts and gabhros: Classification, conipositional vurititions, and possible petrogeneUc relations: Geological Society ofAmerica Bulletin, v, 83, no. 8, p. 2357-2382.

James, O.B., I-Iedeiiqtiist, J.W., Ijlanchard, D.P, Budalin, J.R., and Compston, W., 1978, Consortium breccia 73255: Petrology, major- ;m(t trcice-element chemistry, and Rh-Sr syst,ematics of aplianitic lithologies: LPSCP 9, v. 1, p. 789-819.

Jessberger, E.K., Doniinilt, B., Kirsten, T., and Staudacher, 'l., 1977~1, New ~")Ar-:"'Ar ages ofApollo 16 breccius and 4.42 A13 old anorthosites labs.l: LS VHI, pt. 1, p. 51 1-513.

Jessherger, E.K., Horn, P., and Kirsten, 'I:, 1975, ¥""Ar-~l"A (lziting of lunar rocks: A met.hodical invest,igation of mart! basalt 75075 1iihs.I: LS VI, pt. 1, p. 4-11-443.

Jcsshcrgq K.K., Huneke, J.C., llodosek, FA., and Wasserburg, G.J., 1974, I-ligli resolution argon amilysis ofiieutro~i-iwudi- ated Apollo 16 rocks ;md st?pariitod minenils: LSCP 5, v. 2, p. 1419-1449.

Jessherger, E.K., Kirstm,'S., Staucliicher,T., 19771), One rock and many ages-further I<-Ar (hitti on consort,iurn breccia 73215: LSCP 8, v. 2, p. 25H7-2580.

Jessbcrger, E.K., Stauclticher, 'l., Dominik, I]., and Kirst,en, 'I'., 1978, Argon-argon ages ofaphaniie samples from consort,iuni breccia 73255: LPSCP 9, v. 1, p. 8-11-854.

cJolinso~i, T.V., Malaon, D.L., Phillips, R.J., and Saunders, R.S., 1975, Vidicon spectral imaging: Color enhuiiceilient and digi- till maps: LSCI' 6, v. 3, p. 2677-2G88.

Johnsoii, 'S.V., S-iHunders, R.S., M;it,son, D.1-., and Mosher, J.L., 1977, A'I'iO:! abundance map for the iior1,lierii mnrin: LSC118, v. 1, p. 1029-1036.

Jones, E.M., and Santlford, M.T., 11, 1977, Numerical simulation of a very lurgr explosion at the enrtlik surface with possible application t,o textites, i i i Roddy, U.J., Popin, R.O., and Mer- rill, 1<.13., eds., Inipuct and explosion cratering: Planetary and terrestrial implications: New York, I'ergamon, p. 1009-1024.

Jo~ies, G.M.S., 1977, Complex craters in ;>Iluviuni, i n Roddy, D.J., Pepin, It.<)., and Merrill, R.B., eds., Inipucl and explosion cratering: Planetary and tm'estrial iniplications: New York, Pergamon, 11. 163-183.

Karlstrom, T.N.V., 1974, Geologic map of the Scliicknrd quad- rangle of the Moon: USGS Map 1-823 (LAC-110), scale 1:1 ,000,000.

Kaula, W.M., 1977, On t,he origin of the moon, wit11 eiiiphiisis on bulk composition: LSCP 8, v. 1, p. 321 -331.

Kiiula, W.M., Schubert, G., LingcnIklter, R.E., Sjogron, W.L., and Wollcnhaupt, W.R., 1973, Lunar topography from Apollo 15 and 16 laser ultimel.ry: LSC114, v. 3, p. 2811-2819.

-1974, Apollo li'iser iilLimet,ry and inibrences cis to lunnr structure: LSCP 5, v. 3, p. 3049-3058.

Keil, I<l:ius, Kurat, Gero, IJrinz, Martin, and Green, J.A., 1972,

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THE GEOLOGIC HISTORY OF THE MOON

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N u k u n i ~ ~ r a , Yosio, L u n ~ ~ n l c i n , D.R., L ~ t l i a m , (i.V., Hwini;, Maurice, Dormon, H.J., Press, Frank, nnd'It~ltsoz, Nafi, 1973, Ntw seismic data on the state of the, dix~p lunar interior: Science, v. 181, no. 4094, p. 49-51.

Nakainui'~, Yosio, Lal,hain, G.V., Dorman, H.J., il)rnliini, A,-B.K., Koyaina, Junji, and I-Iorvath, Peter, 1979, Shallow nioon- quultes: Depth, distribution and implications us to th(! pres- enl, state of the lunar interior: LPSCP 10, v. 3, p. 2299-2:jO:).

Ni1s11, D.B., and Conel, J.E., D7i'i. Vitrificution darlteiiiiig of rock powders: Implications for optical propi:rtics of tlit: lunar sur- face: The Moon, v. 8, no. '3, p. 246-3($'1.

Ne~ikuni, Gerhm-cl, 1977, Uitlerent agesoflunar light plains: The Moon, v. 17, no. 4, p. 38:i-393.

Neuk~iin, Gerhard, mid Konig, Beiitc*, 11976, Dating of individi~iil lunar craters: LSCP 7, v. 3, p. 2867-2881.

N ~ I I ~ ~ L I I I I , Gcrliard, Ko~iig, 13eate, and Arltiini-I1an1ed, Jafar, 1975a, A study of lunar impact crater six(!-distril~utions: Tlie Moon, v. 12, no. 2, p. 201-229,

Neultum, Gerhiird, Konig, Beate, Feclitig, H,, and Sl,orzer, I)., 19751), Cratering in the earth-moon system: Consequences for age dctenninntion by cniter counting: LSC1' 6 , v. 3, p. 2597-2(i20.

Norninn, M.D., and Ryder, Graham, 1979, A summary of the petrology and geochemistry of pristine 1iigl1lnncIs rocks: LJIJSCl' 10, v. 1, p. 531-559.

NLIII~S, PI)., 'Ihtsumoto, Mit,sunol)u, and Unruh, D.M., 1975, U- ,, Ili-l3l~syst~~~~aticsofii~iorl~I~ositicgai~bros 78155 and 7701 7- implicnt,ions for early lunar evolution: LSCP 6, v. 2, p. 1-131-1444.

Nyquist, L.E., 1977, L~narllb-Sr~hrOnOll)gy: Physics zinc1 C11t:m- istry ofthe Esirth, v. 10, no. 2, ]I. lO:!-142.

Nyquisl,, L.E., Bunsal, B.M., und Wiesmann, H., 1975, lib-Srages mid init,iiil "SrJH"Srfor Apollo 17 basults am1 KRl~lC1' 1)ns;ill 15:186: LSC1' 6, v. 2, p. Ifll~15- 14d5.

-1976, Sr isotopic constr~~ints on the petrog~nesis of Apollo 17 mare 1jasalt.s: LSC13 7, v. 2, p. 1507-1528.

Nyquist, L.E., Hansal, B.M., Wicsninni~, II., iiiul John, 13.-M., 1974, Taurus- LiUrow chronology: Some constraints on c:irly lunar crust,al development: 1,SCIJ 5, v. 2, 1). 1515-1539.

Nyquist, L.H., Bunsal, B.M., Wooden, .J.I..., and Wies r~~~i in , H., 1977, Sr-isotopic constraints on the pet,rogenesis of Apollo 12 mare basalts: LSCP 8, v. 2, p. 1:iS:)-1415.

Nyquist, L.E., lteimold, W.U., Iiogard, D.I)., Wooden, J.I.., Hun- sal, B.M., Wicsniiinn, 1-I., and Sliih, C.Y., 1981u,Acompt1ral.ivt' Itb-Sr, Sm-Nd, and K-Ar study of shocked norite 782:!(i: 13vi- dence ofslow cooling in the lunar crust,?: LIJS(;P 12, pi.. I$, sec. 1, p. 67-97.

Nyquist, L.E., Sliih, C.-Y., Wooden, J.L., Bans;il, B.M., and Wiesmann, H., 19790, 'Shc Srancl Nd isotopic record ofApollo 12 l~asalts: Implications for lunar geochemical evolution: l~lJSC1' 10, v. 1, p. 77-11-1.

Nyquist, L.E., Wicsiiiann, I-I., Wooden, J.L., Buns;il, 13.M.. and Shill, C.-Y., 197911, Age and REIC abundances of anortliositic norite from 154155 lal)s.l, in Papers presented t,o the Con- feronce on the Lunar Higli1;inds Crust.: Lunar ~ n c l IJliinetary Institute Contribution 394, p. 122-124.

Nyquist, L.E., Wooden, J.L., Shill, C.-Y., Wiesmaiin, I-!., and Bansal, li.M., 1981b, Isol,opic and ItEE shidies o f l ~ n ~ a r basalt 12038: Implications Ibr pel,roge~iesis of aluminous marc hasalts: Earth and l'lanetiiry Scienct: IJetters, v. 55, no. 3, p. 335-355.

Obt:rheck, V.K., 1971'd, Lahonitory simulation of inipiict cnitering with high explosives: Journiil ol'ticophysical Research, v. 76, no. 23, p. 5732-5749.

-19711), Si~nultai i~wis impact and lunar crciters: Tina Moon, v. 6, no. 1-2, p. 83-92,

-1975, Tlie role of bnllistic erosion and sedimviit~iition in 1um1r stratig~'l~pliy: Reviews of Geophysics iind Spiict, I'hys- ics, v. 13, p. Xi7-362.

-1977, Application of high explosion cmtwiiig data to plan- etary problems, in Roddy, D.J., Pepin, R.O., and Merrill, R.B., eds., Inipi~cl, ;md explosion cratering: Plant?tary and ter- resixial iinplications: Now York, Pergaiiion, p. 45-65.

Oherbeclt, V.R., lind Morrison, R.I.I., 19731, On the Ibrmation of the lunar 11ei~ingl)om~ puttern: LSCP '1, v. 1, p. 107-123.

-1973b, The lunar lierriiigboiie pattern, pt. 11 of Crat,er studies, [chap. 1 32 o/' Apollo 17 prel i ini~i~ry science niport: NASA Report 31'-330, p. 32-15 to 32-29,

-1974, Laboratory simuliition of the liurringboiir patU!rn associiitec! with lunar secondiiry crater c11:iins: 'I'lic~ Moon, v. 9, no. 3-4, p. 415-455.

-1976, Candidate areas Ibr in .si!u ancient lunnr rn~terinls: LSCIJ 7, v. 3, p. 2983-9005.

Oberheclt, V.R., am1 Quiiide, W.L., 1967, Estiiiiatvd ~.liicltiicss ofii fragmental surface layer in Oceaniis Procellaruni: Journal of Geophysical Itrseiircli, v. 72, no. 18, p. 4697-4704.

-196'8, (ienetic inipliccilions of hm:ir regolith iliiclci~oss variations: Icarus, v. 9, no. 3, p. 4'16-'165.

Ol~crhrclt, V.R., Horn, l~riedricli, Morrison, It.Il., Qunide, W.I,., and Gi i~~l t , D.R., 1975, On the origin of thç lunar sinootli- plains: 'She Moon, v. 12, no. 1, p. 19-54.

Oberbcck, V. It., Morrison, It. I-I., Hora, Fririlrich, Quuidc, W. I,., and Gault,, 1). E., 1974, Smoot~h plains and contiii~~ous depos- its of craters zinc1 busins: LSCI' 5, v. 1, p. 111-1 TO.

Oberbeck, V.R., Quaicle, W.L., Arvidson, U.K., and Aggarwal, 1-I.K., 1977, Comp:~riiiive studics ofluniir, rnart,i;tn, ;ind nw- curian cniters and phiins: (Journal ofGoopIiysici11 Iteseiircli, v. 82, no. 11, p. 1681-1698.

Ol~wl~eclt, V.R., Quiiide, W.I,., and Greeley, Iionald, 1969, On the origin of lunar sinuous rilles: Modern Geology, v. I, no. I , p. 75-80.

Ofii~!kl,'l'.W., 1971, Geologic inup oftlie Schiller quiidruiigle ol'tlir Moon: USGS Map 1-691 (LAC-l25), scale 1:1,000,000.

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Ollield,'S.W., and Polin, H.A., 1970, I,ii~iarcr;itt!r niorpl~ology and rehitivc-agt! c lder~i i inat ion of geolodc units-piirt. 2. Applications, in Geological Siirvoy research, 1970: IJSGS I'ro- fessioiial Paper 700-C, p. Cl(i;i-Cl(i9. - -1979, Geology of tiit! Drciiturville iinpiict stnicture, Mis-

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O'KceSe, J.A., Lowmun, P.O., find Cunieron, W.S., 1967, Lunar ring dikes froiii Lunar Orbiter I: Science, v. 155, no. 3758, p. 77-79.

O'Keefe, J.I)., and Ahreiis, T.J., 1975, Shock i-fleets from a large impact on the moon: LSCP (i, v. ti, p. 2831 -2844.

-1977, Impact-ind~tci-d energy partitioning, melting, and vaporization on t,errestrial planets: liSCl' 8, v. 9, p. :i357-:i;J7'1.

-1978, Inipiict flows ant1 cratering scaling on l.he moon: Physics of the Earth zmd I'lanetiiry Interiors, v. 16, no. 4, p. 341-351.

Olson, A.R., and Willwlms, I).E., 1974, Geologic niup ofthe M~iri- U ~ ~ d a r u m quadrangle of the Moon: USGS Map I-837 iLAC-f$'2), scale l:1,OOO,OOO.

Onora'to, I?l.K., Ul~lniaiin, I).lt., nnd Si~rionds, C.1-I., 1976, I-lrat How in impiict n~elts: Apollo 17 Station 6 13ouldrr und some ~ipplicatioiis to other brt~cci:is iwd xenolit.Ii hulcn nie.!Iis: IASC1' 7, v. 2, p. 2449-2407. - 1978, Thu thermal history of Llie Maiiico~~agan impact

melt sheet, Quebec 1Ca11:1dnl: Journal of Geophysical Research, v. 83, no. B6, p. 2789-2798.

Opik, E.J., IilGO, Tlie I L I I ~ W surl'ace 11s an inip~ct, cral.tar: Roynl ~~tro11011licii~ Society Not,icrs, v. 120, p. 'lO'l-'ill.

Orplial, IJ.L., 1977, Calcuhitions ofexplosion cral.ering-11. Cra- tering mechanics and phenomenology, in Roddy, D.J., I'epin, It.O., and Mcwill, lt.13., eds., Inipact, ;ind explosion criitt:ring: Planetary and k~rrestrial implications: New York, Perpunon, p. 907-917.

Piige, N.J, 1970, Geologic map of the Cassini (luadranglc of f,hc Moon: US("% Map I-666 (LAC-25), scale 1 :1,000,000.

1'apiiii~stussiou, D.A., and Wasserhurg, G.J., 1970, lth-Sr ages from t,lie Ocean of Stornis: Earth iind PIiirn4nry Science l ~ a t - l.(>rs, v. 8, no, 4, p. 269-278. - l971;i, Luniirchronology iind t!voIul.ion from iih-SrsLndi(!s

of Apollo 11 and 12 si~inpl(:s: Kart11 am1 1'laiictary Scivncr LPttcrs, v. 11, no. 1, p. 37-62.

-197111, Rh-Sr ages of ignrous roclts froni the Apollo 14 mission and the age ofthe IJKI Mi~uro Fornial,ion: Eartli and l'liinetiiry Science Letters, v. 12, no. 1, p. 36-48.

-1972a, lib-Sr age ofu Luna 16 husull, und the inodi-1 age of lunar soils: Earth ancl l'hi~ietiiry Science.* Lt~t,tcrs, v. Ki, no. 2, p. ;i(i8-:i7-1.

-197211, The I&-Sr nge of ;I crysl.nlline rock fro~ii Apollo I(;: Earth mu1 I'lsniet~iry Science Lcttrrs, v. Hi, DO. 2, p. 289-298.

-1973, Rh-Sr ages am1 initial strontium in basalts Croni Apollo 15: ICtirth :ind i1laneI.ary Scionct! Lt.~t.I,c~rs, v. 17, no. 2, p. 324-337.

-1975, 111~-Sr study of a 1un:ir c1unit.e iii10 (~vidt~nct~ for eiirly luniir cliflerentiates: LSCTd, v. 2, p. 1,167- 1489.

-1976, 1tb-Sr age of trocl.olite 76535: LSCP 7, v. 2, p. 2035-2054.

P:ip;~ntistussiou, U.A., l)eP:ioIo, D.J., :ind W:isscrblirg. G.<J., W 7 . lib-Sr tind Sm-Nd cl~ronology and genealogy of~iiiir(~ I):is;~lIs

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Scott, D.H., Diaz, J.M., and Watkins, J.A., 1977, Lunar farside tectonics and volcanism: LSCP8, v. 1, p. 1119-1130.

Scott, D.H., Lucchitta, B.K., and Carr, M.H., 1972, Geologic maps of the 'Ihurus-Littrow region of the Moon; Apollo 17 pre- mission maps: USGS Map 1-800, scales 1:50,000,1:250,000, 2 sheets.

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Simonds, C.H., 1975, Thermal regimes in impact melts and the

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Simonds, C.H., I'liinney, W.C., and Warner, J.L., 1974, Petrogra- phy and classification of Apollo 17 non-mare rocks with emphasis on samples from the Station 6 boulder: LSCP5, v. 1, p. 337-353.

Simonds, C.1-I., Phinney, W.C., Wurner, J.L., McGee, P.E., Geeslin, Jill, Brown, R.W., iind Rhodes, J.M., 1977, Apollo 14 revisited, or breccias aren't so bad iifter all: LSCI' 8, v. 2, p. 1869-1893.

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Sjogren, W.L., and Wollenhaupt, W.R., 1976, Lunar global figure from mare surface elevations: The Moon, v. 15, no. 1-2, p. 143-154.

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Smith, E.I., and PIartneIl, J.A., 1978, Crater size-shape profiles for the Moon and Mercury: 'Ibrrain effects iind interplanetary comparisons: The Moon and the PIiineLs, v. 19, no. 4, p. 479-511.

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Smith, J.V., Anderson, A.T., Newton, R.C., Olsen, E.J., Wyllie, P.J., Crewe, A.V., Isaacson, MS., and Johnson, D., 1970, Petrologic history of the moon inferred from petrography, mineralogy, and petrogenesisofApollo11 rocks: LSCPl, v. 1, p. 897-925.

Soderblom, LA., 1970, A model for small-impact erosion applied to the lunar surface: Journal of Geophysical Research, v, 75, no.'14, p. 2655-2661.

Soderblom, LA., and Boyce, J.M., 1972, Rel~itive ages of some near-side and far-side terra plains based on Apollo 16 metric photography, pi. A of Photogeology, Ic11ap.I 29 of Apollo 16 preliminary science report: NASA Report S1'-315, p. 29-2 to 29-6.

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Soderblom, L.A., and Lebofsky, L.A., 1972, 'Ibchnique for rapid determination of relative ages of lunar areas from orbital photography: Journal of Geophysical Research, v. 77, no. 2, p. 279-296.

Soderblom, L.A., Arnold, J.A., Boyce, J.M., and Lin, R.I?, 1977, Regional variations in the lunar maria: Age, remanent mag- netism, and chemistry: LSCP 8, v. 1, p. 1191-1199.

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Solomon, S.C., and Head, J.W., 1979, Vertical movement in mare basins: Relation to mare emplacement, basin tectonics, and lunar thermal history: Journal of Geophysical Research, v. 84, no. B4, p. 1667-1682.

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Wilt~elms, D.E., I - l o ~ ~ r c l , K.A., and Wilshire, H.G., 1979, Orologie map ol'l.11e south side of' the Moon: USGS Map 1-1162, scale 1:5,000,000.

Will~elnis, U.K., Obi~rbcck, V.R., and Aggarwal, H.K., 1978, Size- frequency tlistrilnitioiis of primary and secondary lunar impact crat.ers: L1'SCIJ 9. v. 3, p. :I7;!5-37ti2.

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Wolfe, K.W., Lucchil.t.u, U.K., Reed, V.S.. Ulricli, G.IC., iind Sancliez, A,(:., 1975, (icology of the Tiitiriis-Littrow vz~lley door: P I X (i, v. 3, p. 2-1fi:J-2482.

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Wood, C.A., .'i11d Htiail, J.W., 1976, Comparison of impact husins on Mercury. Mars nnd t,he Moon: I'LSC 7, v. ti, p. ;i(i29-:!(<51.

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