Geologic Map of the Upham Hills 7.5-Minute QUADRANGLE LOCATION
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NEW MEXICO BUREAU OF GEOLOGY AND MINERAL RESOURCES NMBGMR Open-file Geologic Map 113 Last Modified 2016 A DIVISION OF NEW MEXICO INSTITUTE OF MINING AND TECHNOLOGY ȱȱ 107°0'0"W 106°57'30"W 313000 315000 314000 316000 106°55'0"W 318000 317000 324000 323000 32°52'30"N J A' Quaternary 106°52'30"W B' 322000 321000 J 32°52'30"N 3639000 320000 319000 106°30'0"W 107°0'0"W 107°30'0"W San Mateo Mtns. 33°30'0"N 3638 000 Sierra Cuchillo Qa 3638000 Qsp/Qpa Qpa Mud Springs Mts. Qpad Engle Caballo reservoir Palomas basin 33°0'0"N Qsp/Qpy Qc/Tu 10 Qpo Qlg 25 Tb5 3636 000 Alivio Upham Hills Qcp(g) 3635000 Tbs Qpo Qpy Qc/Tbs Tbs Dr Tu aw 6 Tbs Qsp/Qpa Tu Qpad Qc/Tu 32°50'0"N 10 3634 000 Qcp(g) Figure 1—Location map, Prisor Hill and Upham Hills quadrangles. Tb55 Qpo(g) Tu Tpp Qpo Qpy Qsp/Qpa Qpy Qc/Tu Qap Qcp Qcp(g) Qs/Qcp(?) Qcp 3633000 Thr(?) Qcp Qcp 3633 000 Qpad Correlation of Map Units Qsp/Qcp Tbs Qcp Qcp 23.0 Tu 5 10 Tuc J Tuc 5 Tuc Qc/Tuc Qc/Tu Qs/Qcp Tui(?) 33.6 33.9 3629 000 Qpo 10 Qpa 37.6- 46.3 Qpa Qc/Tu Qcp(g) Qcp Qc/Tu Qc/Tu Tu 3628000 Qs/Tu Qcp 15 12 Ql 15 Qpa(g) Qs/Qpo/QTcf Tu Qc/Tu Qs/Tu Qcp fault 10 Qs/Qpa Tu(?);Thr(?) Holocene Pleistocene Late Late Early KKKKKKKKKKKKKKKKKKKK Unconformity Tu Tuc Tui Tu Tb7 Tbs Tb5 KKKKKKKKKKKKKKKKKKKK Minor unconformity (?) Tpp KKKKK Unconformity KKKKKKKKKKKKKK C Qpa QTcf Tu Tlr Point of Rocks Hills West 5,000 Feet (ASL) Q Q Tu Qs/Qcp Qpy Qs/Qpo(?) Tu(?),Thr(?) Qs/Qpo/Qcp 66.0 Qpy 3627 000 Qcl Qs/Qpa 3627000 CRETA. Qpy K Qpa Qpo(?) Tu Qs/Qcl Qs/Qcp Fl Qs/Tu Qcp/QTcf Qc/Tu Tu Qs/Qpa Qpa 14 Qs/Tu Qcl 107°0'0"W 318000 Tbt PRISOR HILL 320000 319000 322000 321000 1 MILE PRISOR WELL 2000 3000 4000 5000 Tlr ALIVIO UPHAM UPHAM HILLS HILLS GILMORE DRAW 0.5 0 6000 323000 ȱě -3,000' La Mesa Surface 5,000 Feet (ASL) QTcf QTcf A' Q Cinder cone (restored) Tu Point of Rocks Hills Tuc Q 4,000' Tu Tu Tu QUADRANGLE LOCATION [575] 835-5490 This and other STATEMAP quadrangles are available for free download in both PDF and ArcGIS formats at: Q 4,000' Tbt Tpp Tpp Tbt 3,000' Tpp Tpp Tui 2,000' 1,000' Strike and dip of bedding 50 1,000' Tlr Tlr MSL 0' 0' MSL Tlr Strike and dip of volcanic bedding Tlr -1,000' -1,000' Horizontal volcanic bedding # New Mexico Bureau of Geology and Mineral Resources Open-file Geologic Map 113 ~ A' ȱȱȱȱȱȱĚ ȱȱȱ in sedimentary rocks -2,000' ȱȱȱȬ -3,000' ȱě -2,000' ȱě -3,000' B June 2002 http://geoinfo.nmt.edu by William R. Seager New Mexico State University, Department of Geological Sciences, P.O. Box 30001, Las Cruces, NM, 88003 5,000 Feet (ASL) Tlr 50 Geologic Map of the Upham Hills 7.5-Minute Quadrangle, Sierra and Doña Ana Counties, New Mexico. North Tbt Tu Tpp 1 KILOMETER A New Mexico Bureau of Geology and Mineral Resources New Mexico Tech 801 Leroy Place Socorro, New Mexico 87801-4796 Tu Tbt Tpp (Connects to section A'-A'' on Prisor Hill) Q Tu Tbt 3,000' Channel Magnetic Declination May 2004 10º 25' East At Map Center Bend in section Q Q Tuc ȱȱ¢ȱȯȱ ȱ¡ǰȱĴȱ ȱ NATIONAL GEODETIC VERTICAL DATUM OF 1929 RINCON -1,000' -2,000' Cross section C-C' 2,000' NEW MEXICO SELDON CANYON NE 0' MSL Tlr? Tlr A 324000 106°52'30"W 7000 FEET CONTOUR INTERVAL 10 FEET THORN WELL Tlr Tui Tlr -3,000' ȱȯȱ ȱ¡¢ȱǰ Ĵȱ ȱǯȱȬȬȱȱ ȱ z 1 1,000' 3625 000 Gelogic contact.—Solid where certain and exposed, dashed ȱ¡¢ȱȱȱĴȬ 0 1000 2,000' Tpp South 0 3,000' Tpp ȱě 1:24,000 1000 Tu Tbt Tpp Tbt UPHAM 4,000' Thr? -2,000' Map Symbols 0.5 Q Tu Tpp MSL 0' 106°55'0"W 1 Tu Qs/Ql(g) Qs/Ql(g) 106°57'30"W Base map from U.S. Geological Survey 1981, from photographs taken 1972, field checked in 1974, edited in 1981. 1927 North American datum, UTM projection -- zone 13N 1000-meter Universal Transverse Mercator grid, zone 13, shown in blue Q Tu Tui 32°45'0"N 317000 316000 Tbt Ql(g) J B Q Thr 5,000 Feet (ASL) 1,000' Qpy Qs/Qcl Qs/Qcl 315000 314000 East Jornada Draw -1,000' ne zo Qs/Qpo/QTcf J 313000 Segments of the Jornada Draw fault zone Ql(g) Ql Qcl 32°45'0"N ěȱȯCross-section only. K 10 Qcl A Cretaceous Tbt 3626 000 Qcl Qs/Qpo/QTcf Love Ranch Formation—Cross-section only. Tlr Tpp Tu Qs/Qcl Qs/Qcl Qs/Tu Palm Park Formation—Pale-grayish–ȱ ȱ ¢ȱ ǰȱ ǰȱ ȱ ěǰȱ volcaniclastic sandstone that probably represents distal piedmont–slope deposits of one or more andesitic stratovolcanoes; conglomerate and breccia clasts range up to boulder size, are matrix supported, and comprise a suite of intermediate composition porphyries containing phenocrysts of hornblende and plagioclase; matrix consists of a poorly-sorted mixture of ash, small clasts, and crystals; all lithologies are probably lahar deposits; prevailingly soft, the unit is poorly–exposed ¢ȱ ȱ ȱ ȱ ȱ ȱ ȱ ȱ ȱ ȱ ȱ ȱ ȱ ȱ ȱ ȱ Dzȱ ǰȱ ȱ ȱ ȱ ȱ ȱ ȱ ¢ȱ ȱ ȱ ȱ ȱ –fan sediments; ȱȱȱ¢ȱȱȱȱȱŜŖŖǯ Tpp Thr Q Tuc 3,000' 3626000 La Tu Tu Tu at ȱȱǰȱȬĚ ȬěȱśȯLight–gray to grayish–tan, crystal and pumice–ȱȬĚ ȱ ěDzȱ–ȱȱȱǰȱǰȱȱ¢ȱĵȱ¢ǰȱȱ ȱȱ biotite, are conspicuous in hand specimens; abundant pumice fragments range from 1 to 3cm in length and weather light–brown; unit is rather densely welded and is a simple cooling unit; white ěȱȱȱ–ȱěǰȱ¡¢ȱśȱǰȱȱěȱśǰȱȱȱȱ ȱ ¢ȱ ȱ ȱ Dzȱ ¡¢ȱ ŗŖȱ ȱ ȱ ȱ ȱ ȱ ȱ ȱ ȱ ǰȱȱȱ ǰȱěȱǯ Tb5 C' Tbt 2,000' ke Tu 4,000' KKKKK Unconformity KKKKKKKKKKKKKK Bell Top Formation, sedimentary member—ȱ ȱ Ȭǰȱ ěȱ ȱ ȱ interbedded–cobble to boulder conglomerate; divided into upper and lower units by medial ash–Ě ȱ ěȱ Ŝȱ ǻŜ); sandstones are medium- to thin-bedded and consist of a mixture of glass ǰȱ ǰȱ ĵǰȱ ǰȱ ȱ Dzȱ Ȭȱ ȱ –sized, white pumice grains are especially abundant and conspicuous. Conglomerate beds are poorly–exposed, generally represented only by disaggregated clasts; these include a variety of dark–gray to reddish–gray porphyries of intermediate composition, similar in appearance and composition to those of the McRae and basal Love Ranch Formations; generally well-rounded, the clasts may be recycled from ȱ ȱ ȱ ȱ Dzȱ ȱ ȱ ȱ ¢ǰȱ Ȭȱ ȱ Ěȱ ȱȱȱȱĚȱȱȱǰȱȱ ȱȱȱęȱȱȱ–Ȯ ȱȱ graben; approximately 235m thick. Tbs Cross section B-B' Bend in section Cross section A-A' Cinder cone (restored) ȱ ȱ ǰȱ ȬĚ ȱ ěȱ ŜȯPale–pinkish to orange–gray, crystal–ǰȱ ȬĚ ȱ ěDzȱ ȱȱ¢ȱȱĵǰȱǰȱǰȱȱȱȱȱ¡ȱȱęȱDzȱ ȱȱDzȱȱȱȱȱȱȱȱ¢ȱȱǻTbs); 7–ŗŖȱǯ Tb6 Camp Rice Formation, piedmont-slope deposits—Boulder to pebble conglomerate, gravel, conglomeratic sandstone, pebbly-sand, sand and silt forming pediment veneers, and alluvial fans ȱȱȱȱȱǯȱȱȱȱȱȱȱȱ fronts, the deposits generally are buried downslope by younger piedmont–slope alluvium (Qpo; Qpy; Qpa); upslope on hillsides, the deposits grade into bouldery colluvium (Qc); unconsolidated ȱ ȱǰȱȱȱȱȱȱȱȱȱȱȱȱȱȱŗȱ ȱ Řȱ ȱ ȱ ǯȱ ȱ ȱ ȱ ȱ £ȱ Ěȱ ȱ ǯȱ ȱ ȱ ȱȱȱȱ¡ȱȱȱȱȱȱǰȱȱ ǰȱȱȱ ǰȱ ȱ Ȧȱ ȱ ȱ ȱ ȱ ȱ ¢ȱ ȱ ȱ ȱ ȱ distal parts of pediments or alluvial fans draining the San Andres and Caballo Mountains. Gypcrete ǰȱȱȱȱŘȱǰȱȱȱȱȮȱȱȱȱȱ ȱȱ ȱȱȱĚȱȱȱȱDzȱȱȱȱ ȱȱȱȱȱQcp(g). Apparently of eolian origin, the gypcrete also overlies younger (Qpo) deposits and so is younger than both Qcp and Qpo; as much as 4m thick. Qcp QTcf Qs/Tu Qc/Tu 56.0 3628 000 Thr ȱȱǰȱȬĚ ȱěȱŝȯLight–grayish– ǰȱǰȱȬĚ ȱěȱȱȱȱȱȱ ȱȱǰȱȱ¢ȱȱȱȱȱĚ ȱȱȱȬĚ ȱěDzȱ ¢ȱȱȱȱȱȱȱěǰȱȱȱȱȱȱȱȱȱ San Mateo Mountains (McIntosh et al., 1991); generally less than one meter thick. Tb7 Colluvium—Bouldery hillside deposits that are slowly moving downslope, mostly by gravity; ȱ ȱ ȱ ȱ ¢ȱ ȱ ȱ ȱ ȱ ȱ ȱ ȱ –slope alluvium of the Camp Rice Formation and therefore represent the most proximal part of the formation. Less commonly, colluvial deposits grade downslope into Qpo or Qpy alluvium. In any ǰȱȱȱȱȱȱȱ ȱ¢ȱ ȱȱȱě¢ȱȱ underlying bedrock relationships over wide areas; mapped boundaries between colluvium and other alluvial deposits are entirely gradational and are generally portrayed on the geologic map ȱ ¢ǯȱ ǰȱ ȱ ȱ ȱ ȱ ȱ ǻȱ ȱ ǰȱ¢Ǽǰȱ¢ȱ¢ȱȱȱȱǯȱŗȮŘȱǯ Qc KKKKKKKKKKKKKKKKKKKK Unconformity Paleocene Qcp Qpy Qc Tb6 Qcp Qc/Tu Qpad Tbs 34.8 8 Tu 10 Tu Qpo Qpa Qcp Qc 28.6 Qpy Qc/Tbs 8 Tb7 Tu Tu Tbs 8 Tu Qcp Qpo Tu Qcp 27 Tu Tu Tu Tuc 32°47'30"N Qpa(g) QTcf Early Tu Tuc Qc/Tuc(?) Thr Qc/Thr Draw 25 Qpy 18 Tu 10 5 25.9- 28 Tu Qpa Qcp Qcp(g) Qcl Late Tuc Qpad Qpo Qpo(g) Early Qpad 5 Qpy Bell Top Formation— Cross-sections only. Tbt ěȱ ¢ȱ ȱ ȯQpa includes medium to large alluvial fans or other Ȭȱȱȱ ȱĴȱȱQpy and Qpo are complex, or where Qpo is locally buried by thin but extensive veneers of Qpy. Qpadȱ ȱ ȱ ęȬǰȱ ȱ Ȭȱ ȱȱȱȱȱȱȱȱȱȱȱȱȱȱȱ Dzȱ ȱ ȱ ȱ Ȭ¢ȱ ȱ ǰȱ ęȱ ȱ ȱ ǰȱ ȱ ȱ ȱ ȱ ȱ ¢ȱ correlative with Qpo, Qpy or Qpa elsewhere. Qpa(g)ȱ ȱ ȱ ęȬǰȱ ȱ ȱ Ȭ¢ǰȱ distal alluvial-fan deposits containing disseminated gypsum. Qpa, Qpad, and Qpa(g) all are ȱȱȱȱȱȱȱĚȱȱȱ£ǰȱ¢ȱǰȱ £ȱěǯ Qpa(g) Plio. 5.3 Miocene Tu ne Qpy 3629000 Tu Qap Ql(g) 2.6 Qc/Tu 8 Tu Qc/Tu 3630 000 32°47'30"N C Tu Tu Tu 5 Qs/Qpa Qc/Tu Tu Tu Tu Tu Qcp Tb7 zo Tu 5 Tu 5 3631 000 Tu Qcp Tu Tu Tu Tu 3630000 Qcp 5 Qs/Qpa Qc/Tbs Ql Oligocene 10 Qcp 10 Tu Qc/Tu 10 Tu Tu Tu Tu Qcp Tu 0.75 Qcp(?) Qa Qpa Eocene Qc/Tu Qc/Tu Qpa 15 Tu 75 QUATERNARY Qcp 3631000 Qc/Tu Tu Qpa Qc/Tu 0.01 Qs/Qcp Tu Tu J Tb5 8 8 Tb7 Tpp Tbs Tu Tb7 Qc Tb5 Tb5 10 C' Qcp Tb5 Tbs Qpa Qc/Tu or Tbs Tu Qcp Qpo Tb7 Tb6 t Tb5 Tbs Tui 3632 000 Qpo Tb5 10 Qsp ul Tbs Qs/Qpad fa Tb5 Tb6 Qcp Tb6 Qcp Qcp Qcp Tb7 Tb7 Tui Tpp da 8 Tbs Qpa 8 na Tbs Jor Qpy Tui Tb5 Radiometric Ages (Ma) Qpy/Qcp TERTIARY Tui Uvas Basaltic Andesite—Black, gray, reddish– ǰȱ ȱ ȱ Ȭȱ Ě Dzȱ ǰȱ massive, to vesicular or amygdaloidal (chalcedony) to platy; locally contains interbedded, very -poorly exposed, brown, coarse–ȱȱDzȱ¢ȱȱȱĚ ȱȱȱ ȱ ȱȱȱȱȱȱDzȱȱĚ ȱȱȱŚ–ŘŖȱDzȱȱȱŗŜŖȱ thick, top eroded. Tu Older piedmont-slope alluvium—ǰȱǰȱȱȱȱ¢ȱĚǰȱ¢ǰȱȱȱȱ pediment veneers; generally inset against older Camp Rice deposits on upper parts of piedmont slopes but overlap and bury Camp Rice deposits downslope. At least two generations of Qpo deposits exist; an older deposit distinguished on upper piedmont slopes by a geomorphic position ȱ ȱȱȱȱȱȱǰȱȱ ȱȱ¢ȱȱȬȱȱǰȱȱȱ¢ȱ deposit, inset against the older, displaying stage II soil carbonate. Like Qpy deposits, clast ȱĚȱȱȱǯȱȱȱȱQpo alluvial–ȱȱȱȱȱ ȱ¡ȱ¢ȱǰȱȱȱȱŘȱǰȱǻQpo(g)), that apparently was developed on eolian gypsum that mantled the fans in late Pleistocene time. Along the sideslopes of Rincon Arroyo and ȱ ȱ ȱ ȱ ȱ ǰȱ ȱ ȱ ȱ Qpo are merely stage III–ȱ ȱ carbonate developed on underlying Camp Rice strata—the erosion surfaces on which the soils are present being correlative with the surface of Qpo deposits elsewhere; Except for these soils, Qpo deposits are at least 2 to 3m thick. Qs/Qcp Qs/Qpo(?) Qc/Tu 3632000 106°30'0"W 107°0'0"W 107°30'0"W Qsp/Qpy Tpp Qcp Las Cruces Qsp/Qcp Qc/Tbs Tu Qpa 40 Kilometers 20 10 0 Qsp/Qpa Qpy Uvas Basaltic Andesite, cinder cone—Reddish–brown to tan, well–bedded basaltic-andesite cinder ȱȬěȱȱȱȱȱȱȱDzȱ Ȭȱ ȱȱ DzȱȱȱȱŘśȱDzȱȱ ȱȱȱȱĚ ȱȱȱȱȱ ȱDzȱȱȱȱǰȱǰȱȱ ȱĚȱȱȱȱ ȱȱǰȱ ȱ ȱ¢ȱȱ¢ȱȱĚ ǰȱȱ¡ȱȱȱ ¢ȱDzȱȱȱȱ¡¢ȱśŖȱȱ¡ǯ Tuc Younger piedmont-slope alluvium—ǰȱǰȱȱȱȱ¢ȱȱ¢ȱĚȱȱȱ ǰȱęȱ ȱ ¢ȱȱȱȱȱǰȱȱȱȱȱȱ at the mouths of such drainageways; includes broad but thin veneers of sediment on middle or ȱȱȱȱȱǯȱȱȱȱȱȱ ȱȱȱȱ ȱȱȱĚȱȱȱ ȱ ¢ȱ ȱ ȱ ¢ȱ ȱ ȱ ¢ȱ Ěȱ ȱ £ȱ ěǯȱ ȱ ȱ Ěȱ ȱ ȱ ǰȱ ȱ ȱ ¢ȱ ȱ ȱ ȱ ȱ ȱ ȱ ȱ ǰȱ ȱ ǰȱ ȱ ȱ ǰȱ ȱ £ȱ ȱ ȱ ȱ derived from the Caballo and San Andres Mountains; unconsolidated, although the uppermost few centimeters may be weakly coherent because of incipient (stage I) soil development; as much as 2–3 m thick. Qpy 20 Miles 10 5 10 32°50'0"N Qs/Qpa/Qcp(g) Dona Ana Mtns. 0 Alluvial-plain deposits—Pale–reddish– ȱȱȱǰȱęȱȱȱ¢ȱȱȱȱ ȱ ȱ ȱ ȱ Dzȱ ȱ ȱ ȱ ȱ ȱ ȱ ¢ȱ ȱ ȱ řǯŖȦDzȱ Ȭȱ ¢ǰȱȱȱȱȱ¡ȱȱDzȱĴȱȱȱȱȱȱ¢ȱȱ vegetation across broad areas; at least 1m thick and perhaps much more. Qap Qc/Tu Qcp(g) 3634000 Rincon Sierra de la Uvas 32°30'0"N 3635 000 Qc/Tbs Qcp(g) Qpo Qsp/Qcp lls Qcp Hatch Tu Hi Qc/Tu Tb6 N DE Santa Fe Albuqu erque Qsp/Qpy Tbs GRA Qc/Tu 10 am 10 O ph 5 Tbs Qpy Tu U Qc/Tu Tbs Qcp Qs/Qpa Tu NEW MEXICO Tb7 Tb7 5 Qpo Qpad Qc/Tbs Tu Qpo 32°30'0"N Qcp(?) Uvas Basaltic Andesite, dikes and plugs(?)—Northwest-trending basaltic-andesite dikes exposed ȱȱ ȱȱȱȱȱ ȱDzȱȱȱȱȱȱ–Ě ȱěȱ ȱ¢ȱȱ ȱȱȱȃȄȱȱȱȱĚ Dzȱȱȱȱȱ of basalt that intrude Tbsȱȱȱȱȱȱȱȱȱ Dzȱȱȱȱŗśȱǯ Tui RI 3636000 Hayner Ranch Formation—Ȧȱ ȱ ȱ ȱ ȱ ȱ –rounded ȱȱȱȱȱȱȱȱ–Ě ȱěȱśȱȱŜDzȱȱȱȱȱřȦŚȱȱ length and are entirely disaggregated from matrix, resulting in “outcrops” consisting of boulder ȱȱȱDzȱ¢ȱȱȱȱȱȱȱȱȱȱ ȱǰȱȬȱDzȱȱȱ¢ȱȱȱȱęȱȱ¢Dzȱȱ ȱŗŖŖȱǰȱȱȱ¡ǯ Thr Axial channel deposits—Brown, pale–red, to dark-reddish–gray sand, silt, and minor gravel on ȱȱȱȱ ǰȱȱ¡ȱȱȱȱȱȱȱDzȱŘȱȱȱǯ Qa Qs/Qpa/Qcp(g) Tertiary Playa deposits—ȮȮ ȱȱȱǰȱ¢ǰȱȱęȱȱȱȱĚȱȱȱȱ¢Dzȱ ęȱȱȱȱȱȬ¢ȱǻQl), but older, buried beds may be gypsiferous as indicated by selenite–rich lake sediment (Qlg) exposed along the southeastern margin of the lake; ĴȱȱȱȱȱȱĴȱȱȱȱȱȱȱ Ql; at least 1m thick and probably much more. Ql s untain Qc/Tbs Tu Qc/Tbs Prisor Hill ns. Tb7 Qcp(g) Upham o Mt Tbs uerto el M Qs/Qcp ll Caba Jornada Qpo Qpy Qcp(g) Cutter res Mo Qsp/Qpa Truth Or Consequences da d Jorna Qcp Animas Mtns. 3637 000 nd San A Qcp 3637000 Engle Qs/Qcp ȱȱǰȱĚȱȯLight–¢ǰȱę–grained, well-sorted sand and loamy sand, as much as 7m thick, that underlies the La Mesa surface and probably represents overbank or eolian ȱ ȱ ȱ ȱ ȱ ȱ ǯȱ ȱ ȱ ȱ ¢ȱ ȱ ȱ ȱ channel deposits consisting of gray, well-sorted, coarse- to medium-grained sand and sandstone ȱĴǰȱ –rounded pebbles of Precambrian granite and chert derived from distant sources; largely uncemented but locally well–cemented by gypsum; locally exposed along the ȱ ȱȱDzȱǰȱȱǰȱȱȱȱ¢ȱQsȱȦȱQpo soils or by thin Qpo alluvium; total exposed thickness is at least 15m, base not exposed. QTcf Eolian sand, parabolic dunes—Pale-red to orange sand in the form of narrow, arcuate, weakly– parabolic dunes, which tend to form discontinuous transverse ridges; generally 1 to 2m in height, although locally they may exceed 4m; except for the highest, the dunes are largely stabilized by Dzȱȱȱęȱȱȱȱȱȱȱȱȱȱȱȱȱ Mountains; dunes overlap both older Qcp and younger Qpa, Qpo and Qpy deposits, and probably ęȱ ȱ ȱȱĴDzȱȱȱȱę–grained or pebbly deposits of Qpy, Qpo or Qcp; generally 1 to 2m thick. Qsp 33°0'0"N Qs/Qcp Fra Cristobal Mtns Qpo Qcp Camp Rice Formation, La Mesa surface—ȬȱȱȱĚȱȱȱȱȱ ȱ ǰȱ ȱ ¢ȱ ȱ ȱ Dzȱ ȱ ȱ ȱ ȱ ¢ȱ ȱ Dzȱ ȱ much as 1.5m thick. Qcl Eolian sand, coppice dunes—Pale-red to pale-orange sand, mostly in the form of coppice dunes, but also including thin-sand sheets, as well as mounds and aprons, the thickest of which may be nearly barren of vegetation; best developed against the bedrock hills above the La Mesa surface; along the southeastern margins of Flat Lake playa; on the valley sideslopes of Rincon arroyo; along ȱ ȱ Ěȱ ȱ ȱ ȱ ȱ ȱ ȱ ȱ Dzȱ ȱ ȱ ȱ ȱ ȱ ȱ escarpment west of Flat Lake; widespread, but discontinuous on the La Mesa surface and on the distal piedmont slopes (especially Qcp) of the San Andres Mountains; as much as 3m thick. Qs 33°30'0"N Qs/Qcp Quaternary sediments— Cross-sections only. Q COMMENTS TO MAP USERS A geologic map displays information on the distribution, nature, orientation, and age relationships of rock and deposits and the occurrence of structural features. Geologic and fault contacts are irregular surfaces that form boundaries between different types or ages of units. Data depicted on this geologic quadrangle map may be based on any of the following: reconnaissance field geologic mapping, compilation of published and unpublished work, and photogeologic interpretation. Locations of contacts are not surveyed, but are plotted by interpretation of the position of a given contact onto a topographic base map; therefore, the accuracy of contact locations depends on the scale of mapping and the interpretation of the geologist(s). Any enlargement of this map could cause misunderstanding in the detail of mapping and may result in erroneous interpretations. Site-specific conditions should be verified by detailed surface mapping or subsurface exploration. Topographic and cultural changes associated with recent development may not be shown. Cross sections are constructed based upon the interpretations of the author made from geologic mapping, and available geophysical, and subsurface (drillhole) data. Cross-sections should be used as an aid to understanding the general geologic framework of the map area, and not be the sole source of information for use in locating or designing wells, buildings, roads, or other man-made structures. The map has not been reviewed according to New Mexico Bureau of Geology and Mineral Resources standards. The contents of the report and map should not be considered final and complete until reviewed and published by the New Mexico Bureau of Geology and Mineral Resources. The views and conclusions contained in this document are those of the authors and should not be interpreted as necessarily representing the official policies, either expressed or implied, of the State of New Mexico, or the U.S. Government. B' South 5,000 Feet (ASL) 4,000' 3,000' 2,000' La Mesa Surface Jornada Draw Point of Rocks Hills QTcf Q Thr Q Tu Tu Tu Tpp Tpp Tbt Tbt Tbt Tbt Tbt Q Q Prisor Hill segment of the Jornada Draw fault zone Upham Hills Segments of the Jornada Draw fault zone Tu Tpp 4,000' Tpp Tpp 3,000' Tpp 1,000' 5,000 Feet (ASL) Q Tbt Tpp North 2,000' Tlr Tlr 1,000' Tlr MSL 0' 0' MSL Tlr Tlr -1,000' -2,000' -3,000' -1,000' ȱě ȱě -2,000' -3,000'
