Geologic Map of the Prisor Hill 7.5-Minute QUADRANGLE LOCATION
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NEW MEXICO BUREAU OF GEOLOGY AND MINERAL RESOURCES A DIVISION OF NEW MEXICO INSTITUTE OF MINING AND TECHNOLOGY 107°0'0"W D' 314000 106°57'30"W 316000 317000 318000 319000 106°55'0"W 321000 320000 323000 322000 106°52'30"W 324000 Map Unit Descriptions 33°0'0"N J 33°0'0"N 315000 NMBGMR Open-file Geologic Map 114 Last Modified 2016 Quaternary Qpy Qs/Qcp Q Qcp Tlrs Qpa Qpa Qs Tlrs Qa Tlrs 20 Qpad Qpy Qpy Tlrs Qpo Qs/Qcp 3651000 Qs/Qcp Tlrs 3651000 Qs/Qcp Qsp/Qcp Qpa Qpy Tlrs Qpy Qsp/Qcp Qs/Qcp Qa 3650000 Tlrs 15 Tlrs Qpy Qpy A' J 20 ȱǰȱȱȯPale-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 the western Ěȱȱȱȱȱ ȱȱȱ ǰȱȱȱȱȱ ȱȱȱ ȱȱȱ 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. ȱǰȱȱȯPale-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 vegetation; forms ȱęȱȱȱȱȱȱȱȱȱȱȱȱȱǯȱȱ overlap both older Qcp and younger Qpa, Qpo and Qpyȱǰȱȱ¢ȱęȱ ȱ ȱȱĴDzȱȱȱȱęȬȱȱ¢ȱȱȱQpy, Qpo or Qcp. Generally 1 to 2m thick. Qcp Qpy Qpo 3650000 Qsp Qc Tlrs Qpa Qpo Qpad Qpy Qpy 3649000 ¡ȱȱȯBrown, pale-red, to dark-reddish-gray sand, silt and minor gravel on the bed ȱȱ ǰȱȱ¡ȱȱȱȱȱȱȱǯȱŘȱȱȱǯ ȱȬȱȯǰȱȱȱȱȱ¢ȱȱ¢ȱĚȱȱȱǰȱ ęȱ ȱ ¢ȱ ȱ ȱ ȱ ȱ ǰȱ ȱ ȱ ȱ ȱ ȱ ȱ ȱ mouths of such drainageways. Includes broad but thin veneers of sediment on middle or distal parts of ȱȱǯȱȱȱȱȱȱ ȱȱȱȱ ȱȱȱĚȱȱȱȱ¢ȱȱȱ ¢ȱ ȱ ȱ ¢ȱ Ěȱ ȱ £ȱ ěǯȱ ȱ ȱ Ěȱ ȱ source areas, ranging from predominantly Uvas Basaltic Andesite adjacent to Point of Rocks, Upham ǰȱȱȱ ǰȱȱ£ȱȱȱȱȱȱȱȱȱȱȱ Mountains; unconsolidated, although the uppermost few centimeters may be weakly coherent because of incipient (stage I) soil development. As much as 2-3m thick. Tlrc Tlrc Qpy Qpad 23 Qs/Qcp Tlrc 15 16 18 Tlrc 32°57'30"N Qpo Tlrc Tlrc 32°57'30"N Tlrc Tlrc 3648000 Qpo(?) Tlrc Tlrc 3648000 Jo rn Tlrc Qpy Qpa Qcp ad Tlrc a Tlrc Qpo 3647000 Tlrc D Qpo(?) 3647000 ra Qsp/Qcp w Tlrc Thr ȱ Ȭȱ ȯǰȱ ǰȱ ȱ ȱ ȱ ¢ȱ Ěǰȱ ¢ǰȱ ȱ ȱ ȱ 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 just below the surface of camp Rice fans, as well as by stage III-IV soil carbonate, and and a younger deposit, inset against the older, displaying stage II soil carbonate. Like QpyȱǰȱȱȱĚȱȱȱǯȱ The surface of QpoȱȬȱȱȱȱȱ ȱ¡ȱ¢ȱǰȱȱȱȱŘȱ thick, that apparently was developed on eolian gypsum that mantled the fans in late Pleistocene time. ȱȱȱȱȱ¢ȱȱȱȱȱ ȱȱǰȱȱȱȱ Qpo are merely stage III-IV soil 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. Tui Tu Tbt ěȱ¢ȱȱȯQpa includes medium to large alluvial fans or other piedmont-slope ȱȱ ȱĴȱȱQpy and Qpo are complex, or where Qpo is locally buried by thin but extensive veneers of Qpy. Qpad ȱȱęȬǰȱȱȬȱȱȱȱȱ ȱȱȱȱȱȱȱȱȱȱȱ ǯȱȱȱȱȱ ¢ȱȱ ǰȱęȱȱȱǰȱȱȱȱȱȱ¢ȱȱ ȱQpo, Qpy or Qpa elsewhere. Qpa and Qpad ȱ ȱ ȱ ȱ ȱ ȱ ȱ ȱ Ěȱ ȱ ȱ £ǰȱ¢ȱǰȱ£ȱěǯ Tb7 Tb6 Tlrc Qpad Tlrc Qpo Tlrs Tbs ȱ ȱ ǰȱ Ȭȱ ȯBoulder to pebble conglomerate, gravel, conglomeratic sandstone, pebbly sand, sand and silt forming pediment veneers and alluvial fans adjacent to local hills and mountains. Forming the highest constructional surfaces near mountain 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 to well cemented, the cementation a product of stage IV soil carbonate development in the upper 1 to 2m of the ǯȱ ȱ ȱ ȱ ȱ £ȱ Ěȱ ȱ ǯȱ ȱ ȱ ȱ ȱ ȱ ȱ ¡ȱ ȱ ȱ ȱ ȱ ȱ ǰȱ ȱ ǰȱ ȱ ȱ ǰȱ ȱ limestone/sandstone pebble or cobble gravel and gravelly sand is characteristic of distal parts of pediments or alluvial fans draining the San Andres and Caballo Mountains. Gypcrete soil, as much as ŘȱǰȱȱȱȱȮȱȱȱȱȱ ȱȱȱȱȱ Ěȱȱȱȱǯȱ¢ȱȱȱǰȱȱ¢ȱȱȱ¢ȱǻQpo) deposits and so is younger than both Qcp and Qpo. As much as 4m thick. Tpp ¢ȱ ȱ ȯBoulder/cobble conglomerate consisting of angular to sub-rounded ȱȱȱȱȱȱȱȱȬĚ ȱěȱśȱȱŜDzȱȱȱȱȱřȦŚȱȱȱ and are entirely disaggregated from matrix, resulting in “outcrops” consisting of boulder and cobble lag deposits. Unconformably overlies Uvas Basaltic Andesite and Bell Top Formation on a deep, irregular ȱǯȱȱȱ¢ȱȱȱȱęȱȱ¢DzȱȱȱŗŖŖȱǰȱȱ not exposed. Tlrc Tlrs Tlrm ȱȱǰȱȱȱǻǵǼȯNorthwest-trending basaltic andesite dikes exposed in the ȱȱȱȱȱ ȱDzȱȱȱȱȱȱȬĚ ȱěȱȱ¢ȱ ȱ ȱȱȱȃȄȱȱȱȱĚ Dzȱȱȱȱȱȱȱȱ intrude Tbsȱȱȱȱȱȱȱȱȱ ǯȱȱȱȱŗśȱǯȱ Tlrl ȱȱȯǰȱ¢ǰȱȬ ȱȱȱȱȱĚ Dzȱǰȱǰȱȱ vesicular or amygdaloidal (chalcedony) to platy; locally contains interbedded, very poorly exposed, ǰȱȬȱȱǯȱ¢ȱȱȱĚ ȱȱȱ ȱȱȱȱ ȱȱȱǯȱȱĚ ȱȱȱŚȬŘŖȱǯȱȱȱŗŜŖȱǰȱȱǯ ȱȱǰȱěȯCross-sections only. ȱȱǰȱȬĚ ȱěȱŝȯȱ¢Ȭ ǰȱȱȬĚ ȱěȱȱȱȱȱȱȱ ȱǰȱȱ¢ȱȱȱȱȱĚ ȱȱȱȬĚ ȱěDzȱ¢ȱ ȱ ȱ ȱ ȱ ȱ ȱ ěǰȱ ȱ ȱ ȱ ȱ ȱ ȱ ȱ ȱ ȱ ȱ Mountains (McIntosh et al., 1991). Generally less than 1m thick. ȱȱǰȱȬĚ ȱěȱŜȯȬȱȱȬ¢ǰȱ¢ȬȱȬĚ ȱěǯȱȱ ȱ¢ȱȱĵǰȱǰȱȱȱȱȱȱ¡ȱȱęȱǯȱȱȱ Dzȱȱȱȱȱȱȱȱ¢ȱȱǻTbsǼǯȱŝȬŗŖȱǯ ȱȱǰȱȬĚ ȬěȱśȯȬ¢ȱȱ¢Ȭǰȱ¢ȱȱȬȱȬĚ ȱěDzȱ Ȭȱȱȱǰȱǰȱȱ¢ȱĵȱ¢ǰȱȱ ȱȱǰȱȱ conspicuous in hand specimens. Abundant pumice fragments range from 1 to 3cm in length and ȱ ȱ ǯȱ ȱ ȱ ȱ ¢ȱ ȱ ȱ ȱ ȱ ȱ ȱ ǯȱ ȱ ěȱ ȱȱȬȱěǰȱ¡¢ȱśȱǰȱȱěȱśǰȱȱȱȱȱ¢ȱ ȱȱǯȱ¡¢ȱŗŖȱȱȱȱȱȱȱȱȱ ǰȱȱ ȱ ǰȱěȱǯ ȱȱǰȱ¢ȱȯȱȱȱǰȱěȱȱȱȱ ȱȱȱǯȱȱȱȱȱ ȱȱ¢ȱȱȬĚ ȱěȱŜȱǻŜ); ȱ ȱ ȱ ȱ ȱ ȱ ȱ ȱ ȱ ȱ ¡ȱ ȱ ȱ ǰȱ ǰȱ ĵǰȱ sanidine, and biotite; sand to granule-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 McRae and Love Ranch conglomerates; ȱȱȱ¢ǰȱȱȱȱĚȱȱȱȱȱĚȱȱȱǰȱȱ ȱȱȱęȱȱȱȬȮ ȱȱǯȱ¡¢ȱŘřśȱǯ ȱȱȯȱ¢Ȭȱȱ¢ȱǰȱǰȱȱěǰȱȱ 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 only along the northeastern edge ȱȱȱȱ ȱȱȱ ȱȱȱȱ Dzȱ ǰȱȂȱȱȱȱ ȱȱ¢ȱȱȱȱȱȬȱDzȱȱȱȱ¢ȱȱȱȱȱŜŖŖǯ ȱ ȱ ȯGray to reddish-gray conglomerate, tan to reddish-brown conglomeratic ȱ ȱ ǰȱ ȱ ȱ ȱ ȱ ǯȱ ȱ ȱ ęȬȱ ȱ ȱ ȱ section and toward the east. Outcrops containing conglomerate were mapped as Tlrc; those consisting of interbedded sandstone and mudstone are designated Tlrs; and outcrops of mudstone are shown as Tlrmǯȱȱȱȱ ȱȱȱȬȱ¢ȱȱȱȱĚȱȱ origin, as well as minor poorly sorted, angular, matrix-supported types indicative of deposition on alluvial fans; conglomerate bodies are channelform in geometry and exhibit trough crossbedding. Although angular boulders are locally present in the fanglomerate, clasts are generally cobble size, decreasing to pebble size upward in the section. Clasts consist mainly of Paleozoic limestone and sandstone and Precambrian granite, with lesser amounts of intermediate-composition porphyries. Sandstones are coarse to medium grained, crossbedded, channelform bodies as much as 7m thick, exposed for tens to hundreds of meters along strike; enclosed in red mudstone units, the Ȧȱ ȱ ȱ ȱ ȱ Ěȱ ȱ ȱ ȱ Ěǰȱ respectively. Red mudstone in the stratigraphically highest and easternmost outcrops of the formation ȱȱȬĚȱǰȱ¢ȱȱȱȱDzȱȱȱȱȱȱǻŗȱǼȱ (Tlrl) within mudstone probably indicates the presence of a local fresh- water pond. The formation is the ęȱȱȱȱȱǰȱȱȱȱȱǯȱȱȱȱȱȱȱ ȱ¢ȱȱȱȱȱşŖŖǯ Tlr ȱȱǰȱěȯCross-sections only. Ku ǰȱěȯCross-sections only. Fa ul Qpo/Tlrs Tlrs t 10 Tlrs Correlation of Rock Units on San Mateo Mtns. e Qpo Qa Z Tlrs Qpo/Tlrm 12 F' Tlrs J 12 3646000 11 106°30'0"W 107°0'0"W 107°30'0"W 3646000 16 33°30'0"N Qpa Tb5 Tertiary Qpy Tlrc 3649000 ȯBouldery hillside deposits that are slowly moving downslope, mostly by gravity; most deposits are cemented by stage IV carbonate and grade downslope to piedmont-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 case, the deposits provide a ȱ ȱ ȱ ¢ȱ ȱ ȱ ȱ ě¢ȱ ȱ ¢ȱ ȱ relationships over wide areas. Mapped boundaries between colluvium and other alluvial deposits are entirely gradational and are generally portrayed on the geologic map somewhat diagrammatically Furthermore, small outcrops of unmapped bedrock (Uvas Basaltic Andesite, especially), may locally project through the colluvium. 1 to 2m thick. 33°30'0"N 3652000 3652000 ¢ǰȱěȯCross-sections only. Qpo Tb5 Tbs Tpp 3645000 Tbs 12 12 3645000 Qpad Thr Tbs Qcp Qc/Tbs Qcp Mud Springs Mts. Qcp 15 Qs/Qcp Qc/Tbs Tb7 32°55'0"N 32°55'0"N Tu Qcp Qs/Thr Qpy Qpy Qcp Late Thr 23.8 NEW MEXICO Oligocene J 28.6 Tu Tb7 33.7 33.6 Tb6 Jo rn 34.8 ad Late a ra w 3641000 Middle 3641000 Qpy 37.646.3 Eocene D Qsp/Qcp Tbs Early Paleocene ul t Qsp/Qcp Tu Tbt 4,000' 3,000' Tpp Sierra de la Uvas 2,000' 2,000' 1,000' 1,000' Tlr 20 40 Kilometers MSL 0' Las Cruces 0' MSL 10 Ku -1,000' 106°30'0"W 107°0'0"W -1,000' FIGURE 1—Location of Prisor Hill quadrangle and surrounding quadrangle locations. Tlrs 56.0 Tlrc Cross section A-A' 5,000 Feet (ASL) Unconformity 65.0 Prisor Hill F Southwest Tlr F' Northeast Cross section E-E' Segment of the Jornada Draw fault zone Jornada Draw Thr Q Thr Tpp 4,000' Ku Segment of the Jornada Draw fault zone Q Tu Tu Q Tbt 5,000 Feet (ASL) Q Tu Tbt 4,000' Tbt Zo ne 3,000' Qpy 5,000 Feet (ASL) Qs Tlrm 3640000 Qpy Thr Unconformity Qpo 3640000 Qcp Thr 3,000' 107°30'0"W Tlrl Qa Fa Qpa 10 Tu Thr Rincon 20 Miles 10 5 Thr Qpy 4,000' 10 Tpp Qpy Qpad 5,000 Feet (ASL) E' Southeast Cross section F-F' Minor unconformity (?) Qs/Qcp Qsp/Qpa Tb5 0 Tbt Tbs 3642000 Upham Hills Doña Ana Mtns. 0 Prisor Hill E Northwest N DE Albuqu erque Tbs 3642000 GRA Hatch Santa Fe Unconformity 25.928 Prisor Hill 25 Unconformity Early Qs/Qcp Qs/Qcp Qsp/Qpad Upham Alivio 5.3 Qs/Qcp E' Caballo Mtns. 1.8 Qsp/Qcp Qs/Qcp Palomas basin O 3643000 Thr CuĴer RI Qsp/Qpa Tb7 Minor unconformity Middle Early Qsp/Qcp Qpy 0.75 Animas Mtns. Qc Truth or Consequences uerto Thr Pleistocene Qc/Tbs Tb7 3644000 3644000 Qpa Qpa Tb7 Tu Miocene Pliocene Tu Qpo Q Engle el M Qc/Tbs Qc/Tbs Late Qpad Engle da d Tbs Qpa San Andres Mtns. Jorna Tb7 Qc/Tbs Qcp Sierra Cuchillo Qsp/Qpa Tbs 3643000 Qa 0.1 Tui Qpo Qsp Qpy Tbs Qcp Qs 33°0'0"N Qpa Tlrm Tlrc 12 32°30'0"N Holocene Tlrl ȱĴȱ J Radiometric Ages (Ma) Qpo Qpa Fra Cristobal Mtns. Caballo reservoir Tbs 33°0'0"N E 32°30'0"N Tlrm Tlr Tlr Qs/Qcp Tpp 3,000' Tpp 2,000' 2,000' Tlr 1,000' Qcp Qpy F A J D 313000 314000 107°0'0"W Qa J J 32°52'30"N 3639000 315000 316000 317000 318000 106°57'30"W 320000 319000 106°55'0"W 322000 321000 323000 324000 MSL 0' 0' MSL Ku Ku 32°52'30"N 106°52'30"W 1,000' Tlr Qpad -1,000' -1,000' Ku Ku -2,000' 1:24,000 Base map from U.S. Geological Survey 1970, from photographs taken 1965, field checked in 1970, edited in 1993. 1927 North American datum, UTM projection -- zone 13N 1000-meter Universal Transverse Mercator grid, zone 13, shown in blue 1 POLECAT TANK DUGOUT CANYON 1000 0 1 UPHAM PRISOR HILL PRISOR WELL NEW MEXICO 0 1000 0.5 2000 UPHAM HILLS GILMORE DRAW 3000 4000 5000 0 6000 QUADRANGLE LOCATION New Mexico Bureau of Geology and Mineral Resources New Mexico Tech 801 Leroy Place Socorro, New Mexico 87801-4796 [575] 835-5490 This and other STATEMAP quadrangles are available for free download in both PDF and ArcGIS formats at: http://geoinfo.nmt.edu Geologic contact – Solid where exposed or well-known, dashed where approximately known, queried where uncertain. 7000 FEET 1 KILOMETER 7 A 4,000' Yoast Draw May 2005 by William R. Seager Dept. of Geological Sciences, New Mexico State University, P.O. Box 30001, Las Cruces, NM 88003 Jornada Draw Q Q 5,000 Feet (ASL) Tbt Tpp 3,000' Unconformable contact 4,000' 3,000' Tlr Tlr 2,000' 2,000' Tlr 1,000' 1,000' MSL 0' 0' MSL Location of geologic cross section -1,000' Geologic Map of the Prisor Hill 7.5-Minute Quadrangle, Sierra County, New Mexico. Segments of the Jornada Draw fault zone Tpp ȱȱȱȱȱȱȱȱĚ A' A' North Tpp Strike and dip of bedding 50 New Mexico Bureau of Geology and Mineral Resources Open-file Geologic Map 114 Cross section F-F' 5,000 Feet (ASL) Fault – Solid where exposed, dashed were approximately known, Ĵȱ ȱǰȱȱ ȱǯȱ Bar-and-ball on down-thrown side. O CONTOUR INTERVAL 20 FEET Magnetic Declination March 2005 9º 48' East At Map Center A South 1 MILE NATIONAL GEODETIC VERTICAL DATUM OF 1929 ALIVIO (Connects to section A-A' on Upham Hills) Map Symbols $ CUTTER 0.5 -2,000' Ku 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. -1,000' Ku Ku -2,000' -2,000' -3,000' -3,000' D South 5,000 Feet (ASL) 4,000' 3,000' Jornada Draw fault zone Yost Draw Q Q Q Tpp Q Q Q Q D' North Aleman Draw 5,000 Feet (ASL) Q 4,000' Tlr 3,000' Tlr 2,000' 1,000' MSL 0' 2,000' Ku Ku 1,000' 0' MSL
