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107°45'0"W

107°45'0"W

107°42'30"W

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107°40'0"W

107°40'0"W

32°7'30"N 32°7'30"N

32°5'0"N 32°5'0"N

32°2'30"N 32°2'30"N

32°7'30"N32°7'30"N 32°7'30"N32°7'30"N241000

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370000.000000 370000.000000

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390000.000000 390000.000000

400000.000000 400000.000000

NMBGMR Geologic Map 59Last Modified June 2021

Comments to Map Users

Geologic Map of the South Peak 7.5-MinuteQuadrangle, Luna County, New Mexico

1 0 10.5 Mile

1 0 10.5 Kilom eter

North American Vertical Datum of 1988

1:24,000

1000 0 1000 2000 3000 4000 5000 6000 7000 Feet

New Mexico Bureau of Geology and Mineral ResourcesGeologic Map 59

byRussel E. Clemons

1985

1 New Mexico Bureau of Geology and Mineral Resources, 801 Leroy Place, Socorro, NM 87801

DRAFT

This draft geologic map is preliminary and will undergo revision. It was produced from either scans of hand-drafted originals or from digitally drafted original maps and figures using a wide variety of software, and is currently in cartographic production. It is being distributed in this draft form as part of the bureau's Open-file map series (OFGM), due to high demand for current geologic map data in these areas where STATEMAP quadrangles are located, and it is the bureau's policy to disseminate geologic data to the public as soon as possible. After this map has undergone review, editing, and final cartographic productionadhering to bureau map standards, it will be released in our Geologic Map (GM) series. This final version will receive a new GM number and will supercede this preliminary open-file geologic map.

Base map from U.S. Geological Survey 2010.North American Datum of 1927 (NAD27) World Geodetic System of 1984 (WGS84).Projection and 1000-meter grid: Universal Transverse Mercator, Zone 13S, shown in blue.10 000-foot ticks: New Mexico Coordinate System of 1927(west zone), shown in red.Roads...........................................................................©2006-2010 Tele AtlasNames.............................................................................................GNIS, 2008Hydrography............................................National Hydrography Dataset, 2005Contours........................................................National Elevation Dataset, 2000

A geologic m ap displays in form ation on the distribution , n ature, orien tation , an d age relation shipsof rock an d deposits an d the occurren ce of structural features. Geologic an d fault con tacts areirregular surfaces that form boun daries between differen t types or ages of un its. Data depicted onthis geologic quadran gle m ap m ay be based on an y of the followin g: recon n aissan ce field geologicm appin g, com pilation of published an d un published work, an d photogeologic in terpretation .L ocation s of con tacts are n ot surveyed, but are plotted by in terpretation of the position of a givencon tact on to a topographic base m ap; therefore, the accuracy of con tact location s depen ds on the scaleof m appin g an d the in terpretation of the geologist(s). An y en largem en t of this m ap could causem isun derstan din g in the detail of m appin g an d m ay result in erron eous in terpretation s. S ite-specificcon dition s should be verified by detailed surface m appin g or subsurface exploration .T opographic an d cultural chan ges m ay n ot be shown due to recen t developm en t. Cross section s are con structed based upon the in terpretation s of the author m ade from geologicm appin g, an d available geophysical, an d subsurface (drillhole) data. Cross section s should be usedas an aid to un derstan din g the gen eral geologic fram ework of the m ap area, an d n ot be the solesource of in form ation for use in locatin g or design in g wells, buildin gs, roads, or otherm an -m ade structures.T he New Mexico Bureau of Geology an d Min eral Resources created the Open -file Geologic MapS eries to expedite dissem in ation of these geologic m aps an d m ap data to the public as rapidly aspossible while allowin g for m ap revision as geologists con tin ued to work in m ap areas. Each m apsheet carries the origin al date of publication below the m ap as well as the latest revision date in theupper right corn er. In m ost cases, the origin al date of publication coin cides with the date of the m approduct delivered to the Nation al Cooperative Geologic Mappin g Program (NCGMP) as part of NewMexico’s S T AT EMAP agreem en t. While m aps are produced, m ain tain ed, an d updated in an ArcGISgeodatabase, at the tim e of the S T AT EMAP deliverable, each m ap goes through cartographicproduction an d in tern al review prior to uploadin g to the In tern et. Even if addition al updates arecarried out on the ArcGIS m ap data files, citation s to these m aps should reflect this origin al publicationdate an d the origin al authors listed. T he views an d con clusion s con tain ed in these m ap docum en ts arethose of the authors an d should n ot be in terpreted as n ecessarily represen tin g the official policies,either expressed or im plied, of the S tate of New Mexico, or the U .S . Govern m en t.

NEW MEXICO BUREAU OF GEOLOGY AND MINERAL RESOURCES A DIVIS ION OFNEW MEXICO INSTITUTE OF MINING AND TECHNOLOGY

Bowlin Ran ch Capitol Dom e Florida Gap

Midway Butte S outh Peak Gym Peak

West L im eHills North Peak Colum bus NE

Quadrangle Location

Magnetic Declination1980

11º 30' EastAt Map Center

New Mexico

New Mexico Bureau of Geology an d Min eral ResourcesNew Mexico T ech801 L eroy Place

S ocorro, New Mexico87801-4796

[575] 835-5490

T his an d other S T AT EMAP quadran gles are available for free down load in both PDF an d ArcGIS form ats at:

http://geoinfo.nmt.edu

Digital layout an d cartography by the NMBGMR Map Production Group:

=gd =s =g =sd

O=b

Oe

Om

Sf

Dp

Mr

TKl

Trp

Ta Tr

QTmQm

Qpo Qbfo

Qca QpaQpy Qbfy

Qs

TectonicBreccia

En larged 4x, n orthwest-southeast cross section (A-A'). S ym bols n ot used on geologic m ap are: Oem –m iddle El Paso Form ation , Oeu–upper El Paso form aiton , Om u–U pham Mem ber of Mon toya Form ation ,Om a–Alem an Mem ber, Om c–Cutter Mem ber, S f1–lower dark-gray Fusselm an Dolom ite, S f2–lower light-gray Fusselm an ,

S f3–m iddle dark-gray Fusselm an , S f4–m iddle light-gray Fusselm an , S f5–upper dark-gray Fusselm an , S f6–upper light-gray Fusselm an .

A'

Ben d inS ection

A6,000

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OemOem Sf1Oe OeuOemOmu

OeuOeu Sf2

Qm

OmaOeu

Sf1Oeu Omu

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Sf1Sf3 Omc?Sf2

Sf2

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Sf2

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Sf4

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Sf2OmcSf4

Sf4

Sf5

Sf5

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=g

Omu

T rue-scale, southwest-n orthwest cross section (B-B') showin g diagram m atically the in terlayered relation s of gran ite (checks) an d horn fels xen oliths (crosses).

Qm

Hornfels xenoliths

Tr

Granite

Ben dS outh Peak

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B'B

01-01–Map U n it–Qs–Win dblown S an d–U n con solidated dun es up to 10 fthigh; m ostly un derlain by caliche horizon ; form s cover over m ap un it

01-02–Map U n it–Qbfo–Older basin -floor sedim en ts–Predom in an tlyn on gravelly to slightly gravelly alluvium in the Mim bres Basin un affected

01-03–Map U n it–Qbfy–Y oun ger basin -floor sedim en ts –Predom in an tlyn on gravelly to slightly gravelly alluvium in the Mim bres Basin un affected

01-04–Map U n it–Qca–U n differen tiated colluvium -alluvium –T hin talus-slope ven eers an d colluvial an d alluvial fills on arroyo sideslopes; foun d in

01-05–Map U n it–Qpa–U n differen tiated piedm on t-slope alluvium –Mixedolder pied m on t-slope alluvium an d youn ger pied m on t-slope alluvium

01-06–Map U n it–Qpo–U n differen tiated pied m on t-slopealluvium –U n con solidated fan deposits, pied m on t-valley fills, an d erosion -surface ven eers, associated with surfaces graded to closed basin s;

01-07–Map U n it–Qpy–Y oun ger piedm on t-slope arroyo alluvium –S ilty togravelly sdeim en ts in hallow drain age ways cut below older fan an d

01-08–Map U n it–Qm –Mim bres Form ation , upper part–Fan gravel an din terbedded san dy len ses represen tin g piedm on t-slope facies; in cludesthin erosion al-surface ven eers n ear m oun tain fron ts; upper layers con tain

01-09–Map U n it–QT m –Mim bres Form ation , lower part–S im ilar to Qm butfoun d on higher terrace an d alluvial fan -rem n an ts; ign eous rock clasts are

02-01–Map U n it–Ta–Horn blen de an desite an d basaltic an desite –In ten selyaltered an d deeply weathered dikes an d sm all irregular in trusion s;

02-02–Map U n it–Tr–Rhyolite–Very light gray dikes, ran gin g from 1 to 18 ftin thickn ess, an d sm all stocks; holocrystallin e, gen erally n on porphyritic,

02-03–Map U n it–Trp–Rubio Peak Form ation –Grayish-purple an d reddishbreccias of polylithic volcan ic clasts gradin g upward in to green ish-graybreccias an d con glom eratic san dston es; basal beds con tain abun dan t

02-04–Map U n it–T Kl–L obo Form ation –In terbedded reddish-brown shale,chert-lim eston e con glom erate, calcareous gray siltston e, san dston e, an dpebble-to-cobble con glom erate; this un it is Darton 's (1916) L obo

03-01–Map U n it–Mr–Ran cheria Form ation –T hin -to m edium -bedded, dark-gray to black, fin e-crystallin e fossiliferous lim eston e; con tain s as m uch as

04-01–Map U n it–Dp–Percha S hale–Dark-gray to olvin e-gray fissile shale;

05-01–Map U n it–S f–Fusselm an Dolom ite–T hin -to m assive-bedded,altern atin g dark-an d light-gray un its (6), m edium - to coarse-crystallin edolom ite; several coral-rich zon es; sparse chert in basal an d upperm ost

06-01–Map U n it–Om –Mon toya Form ation –Basal, coarse san dy dolom ite(Cable Can yon ) overlain but dark-brown , coarse-crystallin e dolom ite(U pham ), thin -bedded, m edium -gray lim eston e an d cherty lim eston e

06-02–Map U n it–Oe–El Paso Form ation –Basal un it of dark-gray, m edium -crystallin e dolom ite overlain by thick m iddle un it of thin - to m edium -bedded, light- to m edium -gray lim eston e an d cherty lim eston e, an d upper

06-03–Map U n it–O=b–Bliss S an dston e–T hin - to m edium -bedded arkosic toquartzose san dston e; grades up to calcareous san dson e an d silty dolom ite

07-01–Map U n it–=g–Gran ite–Fin e- to coarse-crystallin e, red to gray, alkali-feldspar gran ite; con tain s approxim ately 65% perthite an d m icroclin e, 28%quartz, 5% hastin gsite, an d 2% m agn etite, zircon , sphen e, an d apatite;

07-02–Map U n it–=gd–Gran ite with abun dan t xen oliths –Fin e- to coarse-crystallin e alkali- feldspar gran ite (like pCg) con tain in g up to 50%horn blen de an d pyroxen e horn fels xen oliths, predom in an t bedrock type in

07-03–Map U n it–=s–S yen ite an d quartz syen ite–Predom in an tly coarsecrystallin e with m an y aplitic zon es; un weathered rock is bluish gray butm ost outcrops are a yellowish-brown ; com position ran ges from alkali-

07-04–Map U n it–=sd–S yen ite with abun dan t xen oliths–Coarse-crystallin esyen ite (like pCs) con tain in g abun dan t horn blen de an d pyroxen e horn fels

08-01–Map U n it–T B–T ecton ic Breccia–A breccia form ed as a result of

Explanation Of Map Symbols2.11.9 In clin ed fault (2n d option )

6.2 In clin ed beddin g

8.3.2 In clin ed m etam orphic foliation

8.3.3 Vertical m etam orphic foliation

J

J 31.10 Cross section lin e

2.2.3 Norm al fault— Iden tity an d existen ce certain , location approxim ate

2.2.1 Norm al fault— Iden tity an d existen ce certain , location accurate

31.08 Map boun dary

1.1.1 Con tact— Iden tity an d existen ce certain , location accurate

1.1.3 Con tact— Iden tity an d existen ce certain , location approxim ate

2.1.1 Fault (gen eric; vertical, subvertical, or high-an gle; or un kn own or un specified orien tation orsen se of slip)— Iden tity an d existen ce certain , location accurate

2.1.3 Fault (gen eric; vertical, subvertical, or high-an gle; or un kn own or un specified orien tation orsen se of slip)— Iden tity an d existen ce certain , location approxim ate

2.1.7 Fault (gen eric; vertical, subvertical, or high-an gle; or un kn own or un specified orien tation orsen se of slip)— Iden tity an d existen ce certain , location con cealed

2.4.1 Reverse fault— Iden tity an d existen ce certain , location accurate

2.4.3 Reverse fault— Iden tity an d existen ce certain , location approxim ate

2.4.7 Reverse fault— Iden tity an d existen ce certain , location con cealed

2.8.1 T hrust fault (1st option )— Iden tity an d existen ce certain , location accurate

2.8.3 T hrust fault (1st option )— Iden tity an d existen ce certain , location approxim ate