Petrographyandstratigraphy 0fSeville-Trident exploration wells near Deming,New Mexico byBusse// E. Clemons,Professor of geology, New Mexico State University, Las Cruces, NM 88003

Abstract Methods Petrographicanalyses of cuttingsfrom four wildcatoil andgas exploration Well cuttings of varied intervalswere washed and scannedunder wellsdrilled by Seville-TridentCorp. near Deming, New Mexico,from 1981 a binocularmicroscope. The selectedintervals depended on the col- to 1983are reported. Thickness of upperTertiary-Quaternary basinfill south- lectionintervals available, types of lithologiespresent in the cuttings, eastof Demingis interpretedto be about4,000 ft. Basin-fillsediments overlie in lithologies.Eighty-five about5,000 ft of Miocene-Oligocenevolcaniclastic rocks and ash-flowtuffs. and bracketingdistinctive changes petro- TheMiocene- rocks overlie up to 3,600ft of RubioPeak Formation (),which is intrudedby a fine-crystallinequartz monzonite The No. 2 City of Demingwell was drilled to a depth of 12,385ft and bottomedin o/ RubioPeak Formation. The o^ No. 1 McSherrywell wasdrilled to a depthof -1 tttl, 12,495ft, but cuttingsare available only to 12,430ft. About300 ft of probable 2r- PaleoceneLobo Formation is interpretedbeneath the RubioPeak Formation -A andabove about 570 ft of Precambrianmetamorphic rocks. The No. I Hurt z :: Hill Ranchwell, westof Deming,is reportedto have6een drilled to a totaldepth ,. t- of 7,723ft. About 2,300ft of basinfill, 4,800ft of Tertiaryvolcanic roiks intrudedby rhyolite of Red Mountain,and M0 ft of El Paio Dolomiteare \1, representedin the cuttings(deepest cuttings studied were from 7,640ft). Silve

Introduction Seville-Trident Corp., of Carlsbad, California, drilled five wildcat oil and gas exploration wells in central Luna County from 198Lto 1983(Fig. 1.).All were completedas dry holes and no shows of oil

Big Eurro j MrsMfs ,.='lr f+'$.X.{r,o.*'"""",-2/S.{fii| t,,i. ,,,,,,,..,.,,,.s>)lKl)tiI e,2; x' z

Ronch ittle Florido Mfs ;>,"'? oo.. Vlctorio Mts"Hurt 7,723 SrofePork S i n) ?,,,nS-Florido Mts :"i,1,9.q,'.,. '',trtttr,,"4,,.L/, "rir|. oto20 Hochito o ro ?o 30k olum bus

Burro uplift.

Deming Airporl

T23S T24S 5

l Nol Mc Sherry Peak Formation. Third, faults are difficult to detect in the thick, Dt2,430 variedlithology,volcanic sections. Fourth, cavingsof uphole material TD 12,385 during drilling appearto havebeen common and often areabundant --D r\.0 | ily j c Sewoge-l---z-rodisposol I of Deming

FIGURE l-Index maps, showing locations of five Seville-Trident wells and the surrounding irea. The blue rectangle in the top map represents the approximate location of the more detailed bottom map.

Neu Mexia Geology February 7986 WEST EAST $aphic thin sectionswere prepared from No. Demingwell cuttings, 138were pre- 1 City of No. I No. 2 No.I No.I pared from No. 2 City of Deming well cut- Hurf Ronch City of Deming CilY of Dcming McSherry tings,110 were prepared from No. 1 McSherry sec. 8, T24S, RIOW sec. 6, T24S, R8W sec. 6, T24S, R8W sec. 4, T24S, RBW well cuttings, and 55 were prepared from 660 FNL, 1,980 FWL 1.650 FS a EL 6 60 FS&EL 1,980 FS A WL No. 1 Hurt Ranch well cuttings. Petro- elev. 4,4O7 tl elev. 4.282 ll elev 4,275 tl elev. 4,255 ft graphicanalyses of the thin sectionsincluded identificationof rock types and point count- mi ing 100grains on eachslide. (Photocopiesof bosin ll mi u-5 ml 1.5 fitl all grain countsare availablefrom the author upon written request.)It was not considered oosrn bosrn bosin significantto count more grains becauseof 2,200 fitl fill titl the varied interbedded lithologies and the _r\o_li!e _ 2.700 apparentabundance of cavedmaterial. Miocene- Cuttings were collectedby the operator Oligocene from the No. 1 City of Deming well at 5-ft volconics 4.O80 4.225 ,o80 intervalsbetween 800and 4,225ft. Cuttings 4,500 from the No. 2 City of Deming well were S6o level collected bv the operator at 10-ft intervals rhyolile Miocene- :T; of Oligocene between 4,-000and 72,385 ft. Cuttings from Red Mtn. ol^ Miocen e- the No. I McSherry well were borrowid from volconrcs Oligocene 313 voI conr cs Bureau Mines Min- o,ovu wilh some lo the New Mexico of and {u5-io-PioT -1 oi eral Resources and are in envelopes of 30-ft ^-fm.* 7,200 mo nz onrle l- El Poso Fm inlrusive intervals between depths of 1,200 and 12,430 7.723 ft. Lithologies of these cuttings were com- pared with the gamma-ray and neutron-den- logs to verify lithologic changes and to 8,700 sity Rubio )eok Fm. 9 9,O5O Rubio peok Fm. ,ooo further correlate the dominantly volcanic RubioPeok :t ,340 lithologies with the wire-line logs. Cuttings Fm. ond mon from the No. 1 Hurt Ranch well were col- monzonile zonile inlrusive lected at 10-ft intervals between 400 and 7,640 intrusive 10.900 ft. Reported total depth is 7,723 ft, but be- Fm. lubio Peo Lobo IJ cause of lost circulation, no cuttings are Fm monzonile ll ll available below 7,640 ft rrecombrior l2,495 Petrography FIGURE 2-Interpreted columnar sections of the four Seville Trident wells were studied. Preliminary scanning of cuttings under the binocular microscope and petrographic ex- intersertal, pilotaxitic, and hyalopilitic tex- olite of Red Mountain increases with depth amination of about 50 thin sections indicated tures are well represented and micropor- from cryptocrystalline-aphanitic at the sur- that 10 constituent litholoeies could be rec- phyritic hornblende- are common. face to holocrystalline-aphanitic texture re- ognized consistently with relative ease and Cuttings also represent less abundant mafic sembling a microgranite in the deepest certainty. Constituents in fine-sized cuttings rocks containing microphenocrysts and cuttings (Fig. 7). are counted as individual grains even though granules of pyroxene, olivine, and magne- Some rhyolite and chert cuttings are dif- they may be parts of larger rock fragments. tite. Plagioclase laths in some pilotaxitic tex- ficult to differentiate. Thin sections of known For example, fine cuttings of a volcanic ar- tures are as small as 0.002mm wide and 0.025 rhyolites and cherts from mountains in and enite composed of medium (or larger) sand mm long; a few of the intergranular textures around the Mimbres Basin show that gen- grains can yield silt to fine-sand-sized frag- have equant and tabular plagioclase crystals erally the cherts are anhedral-equigranular ments of , rhyolite, ash-flow tuff, up to 1 mm in size. Random estimates of and typically contain minor amounts of cal- carbonate (cement), and mudstone (matrix) plagioclase compositions based on extinc- cite. The rhyolites are less commonly equi- composition. Cuttings of ash-flow tuffs con- tion angles ranged from Ab* to Ab,, with an granular and typically contain microlites and tain individual crystal fragments of quartz, average of about Ab.. (calcic andesine). crystallites. Some small cuttings of devitri- sanidine, and plagioclase as well as tuff ma- fied shard-free matrix from ash-flow tuffs may trix. These and other possible associations be indistinguishable from rhyolites. Rhyolites need to be considered when interpreting the graphs in Figure 5. Relative percentages of Included under the heading of rhyolites Ash-flow tuffs the following 10 components were deter- are the silicic flow and intrusive rocks with mined using point counts: andesites, rhyo- hypocrystalline, anhedral-equigranular, Ash-flow-tuff cuttings were derived mostly lites, ash-flow tuffs, volcanic arenites, single spherulitic, hyaline, and seriate textures. Most from vitric and vitric-crystal ash-flow tuffs to exposed in the Little Florida, grainsof quartz sanidine/plagioclase1Fig. 3), qlrartz and feldspar crystals are less than 0.3 similar those plutonic rock fragments (Fig. 6), intrusive mm long and the average size is about 0.05 Tres Hermanas, and Grandmother Moun- rocks (excluding rhyolites and andesites), mm. Blocky oligoclase and biotite micro- tains; Cooke's, Cedar Mountain, and Black sandstone/siltstone/mudstone,carbonate rock phenocrysts are in a few cuttings; a few sub- Ranges; and Klondike and Carrizalillo Hills fragments, and chert. hedral biotite and plagioclase(?) microlites are (Clemons, 1982a,b; Elston, 1957;licha, 1954; about 0.02 mm. The basin-fill sediments in Thorman and Drewes, 1,979). Quartz, sani- No. 1 and No. 2 City of Deming and No. 1 dine, plagioclase, and biotite crystal frag- Andesites McSherry wells, to depths of 3,400 ft, contain ments (averaging <0.5 mm) are contained in All intermediate to mafic. aphanitic and grains of perlitic obsidian probably derived a cryptocrystalline and hyaline matrix. The aphanitic-porphy ri t ic rocks are'i ncl uded u n- from the Little Florida Mountains. Rhvolite majority of ash-flow-tuff cuttings contain der this heading. Most of the cuttings appear in the No. 1 Hurt Ranch well (Fig.2) is con- cuspate and platy, axiolitic shards and pum- to have come from relatively unaltered vol- sanguineous to the Red Mountain rhyolite ice shards, but ash-flow-tuff cuttings without canic and hypabyssal rocks. Intergranular, dome. The degree of crystalinity of the rhy- shards also are common. Devitrified bands

February 1986 Nm Mexico Geology in these shard-free tuffs closely resemble in- grained sandstonesand conglomeraticvol- with abundant iron oxides; epidote and trusive and flow rhyolites. caniclasticrocks. They arecomposed of vary- chlorite mav be present. Thesearenites are ing proportions of basalt, andesite, latite, generally cemenied with calcite but a few dacite,rhyolite, and ash-flow-tuffrock frag- containmicrocrystalline quartz cement.Cut- Volcanic arenites mentsalong with abundantplagioclase crys- tings from these rocks appear more altered The volcanic arenites are fine- to coarse- tal fragments.The matrix is typically clay rich than cuttings from volcanic intrusives and

FIGURE 3-Photomicrograph of rounded grains of quartz (Q), sanidine (S), FIGURE4-Photomicrograph of intrusive consisting of sericitized plagioclase Plagioclase(P), and varied volcanic rocks (v) from 4,040-ft depth in No. 2 (P), quartz (Q), and chlo"rite(C) from 10,100-ftdeptf, in No. 2 City'of beming City of Deming well Crossednicols; width of field is 3.5 mm.- well.^Crossednicols; width of field is 13 mm

A Percenl Percenl Percenf Percent Percenl Percenl 4,ooog 20 40 60 80

5,OOO

6,OOO zooo

8,OOO o- (D Intrusive o 9,OOO Quorlz / sonidine/ ro,ooo Andesife Rhyol ite Ash-flow plogioclose il,ooo Volconic t2,ooo orenile

Percen I Percent Percent Percent Percenl Percent B 20 40 4,OOO? 60 20 40 .U

5,OOO

6,OOO

7,OOO

3 8,OOO o q) o 9,OOO trusive Ash-flow tuff Quorlz/ ro,ooo An desi te Rhyolite sonidine/ Volconic plogioclose orenile il,ooo t2,ooo

FIGURES-Percentage distribution graphs of the compositionof cuttings in the No. 1 McSherry well (A) and the No 2 City of Deming well (B).

Nm Mexico Geology Februaty 7986

ously describedin the Mimbres River drainage of the Miocene-Oligocenevolcanic sequence type (andesiticvolcanic arenites and calcar- by Clemons(1982a,b,1984, in press),Elston (underlying basin fill) is placed at 4,080ft. eous, altered siltstone) to a total depth of (1957),Jicha(1954), and Thorman and Drewes The No. 1 McSherry well penetratedan an- 1,2,385ft. The No. 1 McSherry well-pene- (t979). desite flow or intrusive between 4,080and trated similar rocks from 9,000to 1,1,,830ft, 4,150 ft (Fig. 5A). Abundant well-rounded exceptfor the 300-ftinterval between11,300- 4,080ft and and 11,600-ftdepths (Fig.5A). Cuttings from Pre-basin-and-rangesurface grainsare in cuttingsfrom above angular varied{ithology grains are in cut- this 300-ft section may represent the Lobo Central Luna County was mostly, if not tings from below 4,150ft; therefore,the top Formation (Paleocene).Lithology of these completely,surfaced by volcanicrocks of the Miocene-Oligocenevolcanic sequence cuttings resembles,but is not identical to, at the onset of basin-and-rangedeformation is placed at 4,080ft. The No. 1 Hurt Ranch the Lobo in the Florida Mountains. Unfor- about 20 m.y. ago. Eocenevolcanism had well penetratedintrusive rhyolite at a depth tunately, 230 ft of hypabyssal intrusive be- probablyburied all older rocksexposed dur- of 2.300ft. The cuttinss between 800- and tween the Lobo(?) and the Precambrian ing the Laramide orogeny. Examplesof the 2,300-ftdepths are chiefly reddish-brown, metamorphicrocks at 11,830-ftdepth (Fig.2) Eocenevolcanic rocks are now well exposed calcareousmudstone and siltstonewith mi- occupy the interval that might include the (encircling the Mimbres Basin) in the Victo- nor amounts of dolomite and volcanic rock basalconglomerates of the Lobo Formation. rio, Grandmother,Good Sight, Florida, and fragments.These rocks are interpretedto be The Lobo is assumedto be absentin the Hurt Tres HermanasMountains as well as in the Upper Tertiary basin fill rather than Lobo Ranchwell because600 ft of volcanicarenites CedarMountain, Cooke's, and Black Ranges. Formation (S. Thompson, III, written comm./ overlie El PasoDolomite. Thesevolcanic ar- Ash-flow tuffs from dominantly Oligocene April 1984).The fine-grainedclastic rocks are enitesclosely resemble basal Rubio Peakrocks eruptionsprobably blanketed the areaby early underlainby volcanicrocks resembling those that rest on the Hell-to-Finish Formation Miocenetime (23.7m.y.ago). These ash-flow cropping out in the Victorio and Grand- (Lower )in the Victorio Moun- tuffs crop out sporadically in the Big Burro, mother Mountains to the west and the Rubio tains (Greg Mack, pers. comm. 1984). Grandmother,Little Florida, and Tres Her- PeakFormation to the eastand north. There- manas Mountains and in the Cedar Moun- fore, the thickness of post-Oligocene basin tain, Cooke's, and Black Ranges.The ash- fill north of Red Mountain is estimatedto be Pre-Tertiary rocks flow-tuff terrane was dotted with a few rhy- 2,300 ft. expected,the older subsurfacestratig- olite flows and basalticandesite vents and As The abundance of rhyolite cuttings from of the wells reflects the stratigraphic flows in latest Oligocene to early Miocene raphy the No. L McSherry well between 3,250and observedin the Florida, Victorio, time (26-23 m.y. ago). The rhyolites include relations 4,080ft and in the No. 2 City of Deming well Big Burro Mountains. That is, the north- those in the Little Florida Mountains, along and at about 4,080 ft probably indicates initial BurreFlorida uplift Elston, the Mimbres Valley north of Faywood Hot west-trending faultingand subsequenteiosion of the Little was segmented by basin-and-range Springs, and probably the rhyolites in the 1958) Florida Mountains rhyolites. Rhyolite cut- and underlies the Mimbres Basin be- Victorio Mountains and Red Mountain. Ba- faulting tings remain an important constituentin the the Florida and Big Burro Mountains. saltic andesitesin southern Cooke'sRange, tween No. 1 City of Deming well to a depth of 2,700 or Paleozoicrocks were pene- BlackMountain, and southeastLittle Florida No Mesozoic ft, which probably representscontinued uplift wells studied, except the El Mountains are penecontemporaneouswith trated by the on the basin-boundingfaults. Perlitic obsi- Formation (Lower ) in the the rhyolites (2623m.y. old). As the Mimbres Paso dian, identicalto the perlitic obsidianat Rock of the No. 1 Hurt Ranchwell. Basinsubsided along basin-and-range faults, bottom Hound StatePark in the Little Florida Moun- gneiss,schist, hornfels(?), and the Eocene-to Miocene-agevolcanic rocks Precambrian tains,is commonin the cuttingsof No. 1 City were drilled provided most of the basin-fill materials. somemicrocline-bearing granite of Deming and No. 1 McSherry wells to below 11,830ft in the McSherry well. Rubio depths of 3,400ft. Peak Formation is the oldest rock that was Basin fill drilled in the No. 2 City of Deming well, at The thicknessof basin-fill a depth of 12,285ft, about l..7mi west of the sedimentseast Miocene-Oligocenevolcanic sequence of Deming is probably about 4,000 ft. The McSherrywell (Fig. 1). Thus, there is a min- boundary between bedrock and overlying Ash-flow tuffs are interbedded with vol- imum of 555ft of relief (855ft if 300ft of Lobo present sedimentsdeposited with the onsetof basin- caniclasticrocks, andesites, and latites to Formation is assumedto be at both and-range deformation in Luna County is depths of 9,000ft in the McSherry well and Iocales)on top of the Precambrianbetween difficult to place both in the cuttings and on to depths of 8,700 ft in the No. 2 City of the two wells. This may be due to faulting the wire-line logs of the McSherry well. The Demiirg well. Ages of ash-flow tuffs deter- but could just as conceivablybe due to an sedimentswere derived from rocks in sur- mined on samplesfrom nearby areasrange erosionaltopography developed on the Lobo rounding rangesthat are similar or identical from 29 to 36 m.y., so this 4,600-4,900-ttse- and Precambrianrocks in post-Laramide and to those rocks that make up the floor of the quence,enclosing the ash-flow tuffs, is con- pre-RubioPeak time. subsidingbasin. Consequently, lithologies of sideredto be mostly Oligocenein age. The ACKNOWLEDGMENTS-I thANK FTANK E. cuttings do not change significantly from upper beds may be early Miocene and the Kottlowski, Director, and the New Mexico above to below the basin floor. Generallv. the basalbeds may be late Eocene. Bureau of Mines and Mineral Resources cuttings of basin-fill sedimentscontain gieater The hypabyssalrock intrudes the Rubio (NMBMMR) especially for financial assis- percentagesof well-roundedgrains. Possibly Peak Formation (Eocene)in the McSherry tanceduring this project and for continuous the basin fill at the McSherrv well is onlv well and the central part of the Oligocen-e support of my geologicalinvestigations in 3,t60 ft, as indicatedby Samihompson, IiI volcanic section in the No. 2 City of Deming southwestern New Mexico. I thank Rudy (written comm./ May 1983). well. Therefore,the age of the fine-crystal- Greenbaum, President of Seville-Trident The No. 1 City of Deming well may have Iine quartz monzonite postdates early Oligo- Corp., for providing the well cuttings and penetratedthe basin floor at 3,900-ftdepth. ceneand may be as young as early Miocene. wire-line logs for study. I am grateful also to Percentagesof ash-flow tuffs are much greater Robert Biebermanand Sam Thompson, III, below 3,900 ft, but lithologies are quite var- NMBMMR, for assistancein the core and iable to a total depth of 4,225 ft. If the ash- Rubio Peak Formation cuttings library and discussionsrelating to flow-tuff cuttings were derived from in situ The No. 2 Clty ol Deming well cut Rubio interpretationsof the cuttingsand logs. Rob- ash-flow tuffs, it seemsthat they should pre- PeakFormation (Eocene) and hypabyssalin- ert Cooper and PaulaNewcomer were very vail for 10'sor 100'sof feet. The No. 2 City trusive rocks from 8,700 to 1,2,385ft. The in- helpful in washing the well cuttings and of Deming well cut dominantly ash-flowtuffs trusive provided most of the cuttings from making petrographic thin sections. The between 4,080and 4,400ft and intermittently 9,000-to 10,900-ftdepths (Fig. 5B). Below manuscript was improved by thorough re- at greaterdepths (Fig. 5B). Therefore, the top 10,900ft the cuttings are distinctly Rubio Peak continuedon page 11

New Mexico Geology February 7985 //cotypes" Number of spec, on Mountains, as of the new species slide or in container (p. 36).P 21..3,P 2r.4, P. 11.00,and P 11.8, all of which were illustrated in Bulletin 14, Schwagerinathompsoni n. sp 2 (vial) P 32 000 Hueco ls near Hueco were found at a locality near Springs 1 (slide) P 32 9 Tanks, El PasoCo , Tex Jemez 2 (slide) P32 10 in the JemezMountains. However, P 11.00 2 (slide) P3277 and P 11.8were not sent to the U.S. National Museum (Table2). Triticitescuchilloensis n sp 2 (slide) P 25 7 Middle Magdalena Cotypes of Triticitesrhodesi arc listed in Bul- Cuchillo Mts. Siena Co , New Mexico letin 14 (p. 45) as including numbers P 31.0, 2 (slide) P262 P 31.1, P 3-1,.2,and P 31.3; however, Need- ham only sent P 31.0, P 31,.'1,,and P 31.3 to Triticitesfresrulensis n sp. 2 in vial P 3 0 Top of Magdalena fm the USNM. FresnalCanyon, Otero Co, New Mexico Polydiexodinaguadalupensis was a new spe- 4 (slide) P31 ciesdescribed in Bulletin 14 (pp. 58-59)with 1 (slide) P 3.2 cot)?eslisted asP 13.0,P 13.1,P t3.2, P 13.3, 2 (slide) P33 P 13.3, 2 (slide) P34 and P 13.4.P 13.0, and P 13.4were illustratedin the text. However, none of these Triticitesgallowayi n. sp 2 (slide) P 8 1 U Magdalena fm La Luz specimensare shown on Needham's list to Canyon, Otero Co , N M Henbest(Table 1). 2 (slide) P82 Therediscovery a 1 (slide) P 8.3 of portion of Needham's 2 (slide) P84 fusulinid collections is encouraging. We are very grateful to F. J. Collier for his efforts to Triticites jemezensisn sp 6 (vial) P 11.0 Top Magdalenafm locatethe U.S. National Museum holdings JemezSprings, N Mex for 2 (slide) P't't 2 and providing copies of related corre- 3 (slide) P 1.1.4 spondence.It is not impossiblethat the re- maining in ^1 specimens are collections Triticiteskellymsis n. sp 2 (slide) P 21 Upper Magdalena; Kelly, N M. elsewhereand may yet be retrieved. We urge 1 (slide) P272 2 (slide) P273 any readersof this article with knowledge of 2 (slide) Da1 n Needham'scollections to contactus.

Triticitesrhodesi n sp 1 (box) 10!ii2';' '' . : P 31 0 Upper Magdalena, Rhodes Reference Canyon, Socono Co., N M ,:' ' Needham, C. E 1937, Some New Mexico Fusulinidae: 1 (slide) lOfrzZlu . P31 1 , New Meico Bureau of Mines and Mineral Resources. 1 (slide) 1_orlzb , P31 3 ' Bulletin 14, 88 pp n Triticitesoentricosus v at. 2 (vial) rmritaeu,,,l P 5 0 Up. Magdalena, La Luz, Otero sacramentoenstsn vat, ,, ',' Co , N Mexico 1 (slide) 10rrrr4 , P52 2 (slide) 10!1]11c&;e,, ,, P5 3 continued page9 Triticiteswellsi n sp 2 (slide) 101114'q&e,,P 23 1 Magdalena fm Barton, Santa from Fe County, New Mexico 1 (slide) 1011-14f , P232 views and suggestionsby Sam Thompson, 1 (slide) 101114,b ' P233 III, and Roy Foster. 2 (slide) 1011,14a&d- P 23.4 References Clemons, R. E., 1982a,Geology of Florida Gap quadran- gle, Luna County, New Mexico: New Mexico Bureau of Mines and Mineral Resources,Geologic Map 52 Clemons, R E ,1982b, Geology of MassacrePeak quad- rangle,Luna County, New Mexico:New Mexico Bureau TABLE 2-Specimens that were illustrated in Bulletin 14 that are still lost. of Mines and Mineral Resources,Geologic Map 51. Clemons, R. E, 1984, Geology of Capitol Dome quad- rangle, Luna County, New Mexico: New Metco Bureau Collectols number Source of Mines and Mineral Resources,Geologic Map 56. Staffellaatolcensis (?) P382,P39 2 Lower Magdalena Fm , Kingston, NM Clemons,R. E., 1985,Geology of South Peakquadrangle, Oznwainellasp P 482 Valle de Ojo de la Parida, Socono Co., NM Luna County, New Mexico: New Mexico Bureau of Mines Fusulinaeuryteines P 37 1.,P 37.2 Sangre de Cristo Mts ; 15-20 mi east of Taos, NM and Mineral Resources,Geologic Map 59, scale1:24,000 Fusulinapattoni P 150, P 15.2 Hemosa Fm., Archuleta Co . CO Clemons, R. E , in press, Geology of the Florida Moun- Fusulinnsoconoensis P762 Lower Magdalena Fm, Socono Mts., Wand, NM tains, southwest New Mexico: New Mexico Bureau of press. Wedekindellinau thysepta P 37 7, P 37.2, Montezuma Hot Springs, San Miguel Co , NM Mines and Mineral Resources,Memoir 43, in P227 Tijeras Canyon, east of Albuquerque, NM Clemons,R E, andBrown,G A, lg%,GeologyofGym Wede kinl elli nn ex cen t r ica P 22 3, P 22.4,P 22 6, Tijeras Canyon Peak quadrangle, Luna County, New Mexico: New P 22.7 Mexico Bureau of Mines and Mineral Resources,Geo- Triticites nebraskensis P 33.3 North end of Siena Los Pinos. 6 mi southeast of logic Map 58, scale1:24,000 Scholle, Socono Co., NM Elston, W 8., 1957, Geology and mineral resources of Tri t ici te s re ntr icosus P93, Cedro Canyon, Manzano Mts Dwyer quadrangle, Grant, Luna, and Sierra Counties, P20,P2.1.,P24 Alamogordo, NM New Mexico:New Mexico Bureauof Mines and Mineral Triticitesbllymsis P 11.0,P 11.8 Jemez Springs in Jemez Mts , NM Resources,Bulletin 38, 86 pp Triticitessp A P 20.3 Coyote Hills, Socono Co , NM Elston, W E , 1958, Buno uplift, northeastern limit of Triticites rhodesi P 31..2 Upper Magdalena Fm , Rhodes Canyon, Socono sedimentary basin of southwestern New Mexico and Co, NM southeasternArizona: American Association of Petro- Schwagrina emaciata P1.000,P123 |arilla Mts , about 4 mi north of Orogrande, Otero leum Geologists, Bulletin, v 42, pp 251,32517 Co, NM Jicha,H. L., 1954,Geology and mineral deposits of Lake Schwa g er i na huec oe n sis P327,P328 About 2 mi northeast of Hueco Tanks, El Paso Co . Valley quadrangle, Grant, Luna, and Sierra Counties, TX New Mexico:New Mexico Bureauof Mines and Mineral Pseud o schw a gei tu t'usuI i noid e s P 32.0, P 32 4, Near Hueco Tanks, El Paso Co , TX Resources,Bulletin 37, 93 pp P325,P326 Thoman, C H , and Drewes, H , 1,979,Geologic map of Pseudoschwagerinaud.deni P 32 00, P 32.1.,P 32 2 Near Hueco Tanks, El Paso Co , TX parts of the Grandmother Mountain East and Grand- Poly die x o d irc g uad al up e nsi s P 13.0,P 1.3.1.,P 73 2, Guadaltrpe Point, TX mother Mountain West quadrangles, Luna County, New P 13.3,P 13.4 Mexico: U.S. Geological Suruey, Miscellaneous Field Studies Map MF-1088, scale1:24,000. !

Nrro Mexico Geology February 1986 11