New Mexico Geological Society Downloaded from: http://nmgs.nmt.edu/publications/guidebooks/16 Lexicon of stratigraphic names used in southwestern New Mexico Christina L. Balk, 1965, pp. 93-111 in: Southwestern New Mexico II, Fitzsimmons, J. P.; Balk, C. L.; [eds.], New Mexico Geological Society 16th Annual Fall Field Conference Guidebook, 244 p. This is one of many related papers that were included in the 1965 NMGS Fall Field Conference Guidebook. Annual NMGS Fall Field Conference Guidebooks Every fall since 1950, the New Mexico Geological Society (NMGS) has held an annual Fall Field Conference that explores some region of New Mexico (or surrounding states). Always well attended, these conferences provide a guidebook to participants. Besides detailed road logs, the guidebooks contain many well written, edited, and peer-reviewed geoscience papers. 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This page is intentionally left blank to maintain order of facing pages. 93 LEXICON OF STRATIGRAPIIIC NAMES USED IN SOUTHWESTERN NEW MEXICO CHRISTINA LOCHMAN-BALK New Mexico Institute of Mining and Technology Socorro, New Mexico This lexicon lists alphabetically under Era headings, 3) From vicinity of Emigrant Hills and Little and discusses briefly, the stratigraphic names which Emigrant Canyon east to Rattlesnake Point, have been used in southwestern New Mexico and ad- northern Chiricahua Mtns. jacent portions of southeastern Arizona to be visited 4) Coarse-gr. with granitic-porphyritic texture; by the 16th Field Conference. The form used is as abund. light-color euhedral feldspar pheno- follows: crysts 15 X 25 mm, carlsbad twinng; 20% clear anhedral qtz., 60% perthite, 10% albite, 10% Unit name (formation or group) —system or period. ferromag. mins. Names printed entirely in capitals are currently ac- 5) Overlain nonconf. by Bolsa Otzite. cepted by the U.S. Geological Survey. Names printed in caps and lower case are used locally or PALEOZOIC have been recently proposed. Names preceded by ABO FORMATION—Permian a dagger (f) have either been abandoned by their authors, have been rejected by the U.S. Geolog- 1) Cent. New Mexico ical Survey, or have lapsed from use. 2) W. T. Lee, 1909, p. 12; redescribed by Need- ham and Bates, 1943, p. 1654-1657 1) Areal distribution given in original description. 3) Abo Canyon, S. end of Manzano Mountains, 2) Reference in which unit was first defined or Socorro Co. mentioned. 4) Dark red, purple, coarse-grained ss., cgl. at base, 3) Typc locality. some sh., 300' to 800' thick. 4) Short lithologic description and thickness at 5) Wolfcampian-Leonardian; lies conf. and gradat. type locality or in the type area. on Bursum Fm., or disconf. on upper Madera 5) Age to stage; contacts; emending or redefining Ls.; overlain conf. and gradat. by Yeso Fm. descriptions; additional information on areal Abo is 1,400' thick in north and thins abruptly distribution and thickness, Ethology, and char- to 250' in the cent. Sacramento Mtns.; farther acter of the beds in the area of the field con- south is composed of two tongues separated by, ference. and transitional with southward thickening, brackish-marine, Hueco Fm.; basal tongue is PRECAMBRIAN the Powwow Cgl. and upper tongue is Deer Mountain red sh. Widespread in New Mexico Granite Gap Granite—Precambrian and in the subsurface of West Texas. 1) Extreme SE Ariz. area and extreme SW New Mexico Alamogordo Member-1\ lississippian 2) E. Gillcrman, 1958, p. 9-12 see Lake Valley Formation 3) At Granite Gap, where Highway 80 crosses Peloncillo Range Aleman Formation ( of Montoya Gp.) Upper Ordo- 4) Holocrystalline, equigranular, med. gr., light vician pink to gray, with hypidiomorphic texture; 1) S. New Mexico 75% is anhedral qtz. and subhedral orthoclase; 2) V. C. Kelley and C. Silver, 1952, p. 60-62 5% albite, 10% microcline, 5-10% microper- 3) Cable Canyon, Caballo Mtns., NW1/4 sec. 10, thite; 1-2% may be small biotite flakes; magne- T. 16. S., R. 4 W. tite and sphene may be present; locally feldspar 4) Alternat. chert and dol. in banded outcrop; xtals may be 2 cm. in dia. chert weathers white, brown, black, is in irreg. 5) Overlain nonconf. by Bolsa Qtzite. bands 1"-3"; dol. dense to grained, med. to light gray. Rattlesnake Point Granite—Precambrian 5) Late Maysville to early Richmond; lies prob. 1) SE Arizona disconf. on Upham dol.; overlain prob. disconf. 2) F. F. Sabins, Jr., 1957b, p. 1322 by Cutter Fm. 94 NEW MEXICO GEOLOGICAL SOCIETY-SIXTEENTH FIELD CONFER El CE Andrecito Member—Mississippian hiatus which van fishes to the SE ); 100'-175' see Lake Valley Formation thick. 5) Meramecian; lies uI conf. on Escabrosa Gp. or ARROYO PENASCO FORMATION—Mississip- conf. on Hachita F -1.; overlain unconf. by Cret. pian rocks. Unit is diffi It to disting. from Hachita Fm., and may on [y be a western facies of the 1) N. and Cent. New Mexico Meramec pt. of :he Hachita Fm. Armstrong 2) A. K. Armstrong, 1955, p. 3, 6 (1962) thinks bes t consid. a memb. of Hachita 3) SW1/4 SEN sec. 5, T. 16 N., R. 1 E., Pinos and Fm. Penasco Canyons, Nacimiento Mtns. 4) Base 18'-20' clean, calc. ss., interb. sh. and ls.; BLISS SANDSTONE ( FORMATION) —Upper 31' fine to coarse gr., gry. to br. ls.; 70' lithog. Cambrian and LowerO rdovician to oolite, gry. med.-bedded ls. upper 10' wh. chert (140' max.) 1) S. New Mexico 2) G. B. Richardson, 5) Meramecian; unconf. on Precam., overlain dis- 1904, p. 27 conf. by Log Springs Fm. or Sandia Fm. 3) S. end of Franklin Mtns., El Paso, Texas (Penn) ; farthest S. expos. in S. Sandia Mtns. 4) Massive to thin b( d. local cgls. and cross-bed. coarse ss., top gla u, onitic, cross-bedd., coarse- Bat Cave Formation—Lower Ordovician gr. ss.; dark brown buff, gray and white; aver- age 200'-300' and 1) S. New Mexico 5) Croixian (Francor n & Trempealeauan stages) 2) V. C. Kelley and C. Silver, 1952, p. 45-52 and basal Gasconad an; Lithology, espec. of up- 3) N. side of Cable Canyon, Caballo Mtns; sec. per half, extreme [y variable laterally and ver- 10, T. 16 S., R. 4 W. tically, glauconite, errug. ss., oolitic hematite, 4) Lower unit predom. biostromes and bioherms shales, dolomitic ;S and brown dolomites and with blue-gray to buff Is. cgls., interbedded with limestones all int Cl bed. in sss.; local qtzites. thin to med. bedd. calcilutites; upper unit med. thruout;—depositi )1. al hiati common; lies non- to thick-bedd. drk. to light gray Is.; dolo ls. and conf. on Precamb,.; overlain conf. and gradat, dol., predom. calcilutites with some calcarenite or disconf. by basa 1 [El Paso beds; contact drawn and calcirudite; brown chert occasionally in arbitrarily on pre d(Dm. of light colored dolo- bands or nodules; local collapse breccia; 200'- mites. Flower, 195 9 p. 58, proposes "to restrict 300' thick. the Bliss to the Ea rly Canadian beds." 5) Middle to Upper Canadian; lies conf. on Sier- rite Ls.; overlain unconf. by Cable Canyon Ss. BOLSA OUARTZITE- Middle Cambrian t Bella shale—Upper Devonian 1) SE Arizona & extr( me SW New Mexico 1) SW New Mexico (Grant County) 2) R. L. Ransome, 1C/0 4, p. 28-30 2) C. R. Keyes, 1908, p. 7-21 3) Bolsa Canyon, on SW side of Escabrosa Ridge, Bisbee Ouad., Ariz. 3) Not designated 4) Green shales, no fossils; 60' thick. 4) Thin basal cgls., erlain by pebbly, x-bedded 5) Lies on Silver sirs. and underlies Berenda ls.; grits, grading up in to med.-thin-bedd., fine to appears to be upper part of Percha shale (Wil- medium grained, SC rted qtz. sands and qtzites, marth, 1938, p. 151) . without feldspars: 400-600+' thick. 5) Late Mid. Cambr ig n; lies with major unconf. Black Prince Formation—Up. Mississippian or Lower on Precambrian; ( erlain conf. by Abrigo Ls.; Pennsylvanian a basal transg. sa n,d, continues eastward into the Bliss Ss. 1) SE Arizona 2) J. Gilluly, J. R. Cooper & J. S. Williams, 1954, Box Member—late Upper Devonian p. 14-16 3) West slope of Gunnison Peak, NE I/4 SW I/4 see Percha Shale sec. 4, T. 16 S., R. 23 E. 4) Med. bedd., fine-gr. sparsely fossilif. lss., with BURSUM FORMATION—Permian a 10'-20' zone of red.-orange interb. lss. and sh. 1) Cent. New Mexico at base in Dragoon Mtns.