Proposed legend andcorrelation ol mapunits forrevised stategeologic map by OrinJ. Anderson andGlenE.Jones,NewMexico Bureau of MinesandMineral Resources, Socono,NM87801 This correlation and description of geologic units is proposed for the next edilion of the state geologic map. Digitizing of geologic maps,-totn-aetait-ea(6rge-scile;"ana Tg regional (small-scale),published since 1955 is underway at the New Mexico Bureau of Tsf Mines and Mineral Resources.If you wish to comment on any aspect of the map project, including the units and descriptions shown here, please write to: State Geologic Map Committee New Mexico Bureau of Mines and Mineral Resources Campus Station Socorro, NM 87801 Qa Ql Qe Qeg Qd Qx Qp Qb Qr Qv Qbo QTb QTa QTr QTe QTg QTgu QTsf QTs Formations; uppermost Mocene to middle Pleistocene Lower part of Gila Group; uppermost Oligocene, Miocene, and lower Pliocene Lower and middle SantaFe Group. Includes Havner Ranch, Rincon Vallev. Popotosa, Cochiti, Tesuque, Chamiti, Abiquiu, and Los Pinos Formations; uppermost Oligoceneand Miocene Upper Tertiary sedimentary units of ColoradoPlateauregion, undivided; may locally include FencELake and Bidahochi Formations of the Little Colorado Basin, and Gila Group in the northern MogollonDatil volcanic field Tbi Bidahochi Formation; alluvial, lacustrine, Alluvium; upper and middle Quaternary eolian, and spring depositsof southern Colorado Phteau region; middle(?) Landslide deposits and colluvium; Miocene to lower Pliocene Quaternary Tfl Fence Lake Formation; coarse alluvial Eolian deposits; Quaternary deposits with minor eolian facies and Gypsiferous eolian deposits; Quaternary pedogenic carbonates, of the southern Glacial deposits; till and outwash; upper ColoradoPlateauregion;mainly Miocene, and middle Pleistocene (baseprobably upp6rmost Olifocene) Lacustrine,playa{ake,eolianandalluvial To Ogallala Formation, alluvial and eolian d e p o s i t s o f m a i o r l a k e b a s i n s ;u p p e r deposits, and petrocalcic soils of Great Quaternary Plans province; middle Miocene to lower Piedmont alluvial deposits; upper and Pliocene (locally includes unit QTe) middle Quaternary;indudes alluvial fan Tln Los Pinos Formation (lower Santa Fe depositsbordering major streamvalleys Group); includes Carson Conglomerate Basalt and andesite flows and vent (Dane and Bachman, 1965) in Tusas deposits; Quatemary Mountains.-SanLuis Basin area Silicic volcanics;Quaternary Tos Mostly Oligocene and upper Eocene sedimentary Basalticvolcanics;tuff rings, cinders, and units, dominantlv volcaniclastic with local intermediatL lavas; Quaternary volcanics;includes Espinaso, Spears, Basalts of North Plains area; lower and Monument ParkSandstone,and PalmPark middle Pleistocene Formations Basalt and andesite flows; Neogene. Basaltic and andesitic volcanics Tnb Includes flows interbedded with SantaFe interbedded with Pliocene and Pleistocene and Gila Groups sedimentary units Tnr Silicic volcanic rocks; Neogene Older alluvial deposits; of upland plains areas, mid-Pleistoceneto mid-Pliocene Tc Chuska Sandstone; limited to Chuska Mountains, in northwest Silicic flows and domes interbedded with Plioceneand Pleistocenesedirnentary units Tv Middle Tertiary volcanic rocks, undifferentiated Older eolian cover sediments and calcic soils of the High Plains region; primarily Tuv Upper Oligocene volcanic rocks, Blackwater Draw Formation; includes undifferentiated; younger than 31J2 Ma scattered playalake, alluvial, and recent Lower Oligocene and Eocene volcanic dune-sandsdeposits(e.g. Tahoka,Double rocks, undifferentiated (dominantly silicic); Lakes,Tule, and BlancoFormations of the rocks 32 Ma and older Southem High Plains area); upper PliTuau Uppermost Oligoceneand lower Miocene ocene and Pleistocene andesitic rocks (26-18 Ma). Includes Bear Gila Group. Includes Mimbres Formation Wallow Mountain Formation (Plio-Pleistocene)and several unnamed Tual Upper Oligocene andesitic rocks (31-26 units in southwestem intermontane basins; Ma); includes Uvas Basalt and Poverty Miocene to middle Pleistocene (base Creek basalticandesite probably uppermost Oligocene) Turp Upper Oligocene rhyolitic pyroclastic rocks Upper Gila Group; uppermostMiocene to (ash-flow tuffs); includes South Crosby Pleistocene Peak Formation, La Jencia, Vick's Peali, SantaFe Group, undivided. Intermontane Lemitar, La JaraPeak,South Canyon Tuff, basin fill of Rio Grande rift region; Bloodgood Canyon Tuff, Shelley Peak, uppermost Oligocene to middle Pleistocene Turkey Springs, Tuff of Little Mineral Upper Santa Fe Group. lncludes Camp Creek, and others. Some contain Rice, Fort Hancock, Palomas, Sierrl volcaniclasticand reworked volcaniclastic Ladrones, Ancha, Puye, and Alamosa rocks. May 1990 New Mexio Geology Tlrp Tla Turf Tlrf Ti Tui Tuim Tli Tps Tsi Tn Tpc TKrn TKoa TKa TKr TKav TKi K Ksv Ki Ka Ku Kvt Kkf Lower Oligocene rhyolitic pyroclastic rocks (ash-flow tuffs); includes Hell's Mesa, Kneeling Nun, parts of the Bell Top Formation, CaballoBlanco,DatilWell, Rock House Canyon and BIue Canyon Tuffs, and other volcanic and interbedded volcaniclastic units (e.g. SpearsFormation) formerly referred to as Datil Group Lower Tertiarv, (Eocene and lower Oligocene)andeiite and basalticandesite flows, and associatedvolcaniclasticunits. Includes Rubio Peak Formation Upper Oligocene rhyolitic flows and masses Lower Oligocene rhyolitic flows and masses Tertiary intrusive rocks; undifferentiated Miocene to Oligocene rhyolitic to intermediate dikes, masses, plugs, and diatremes Middle Tertiary mafic intrusive rocks Quartz monzonites (Eocene)in the Silver City area and Los Pinos Range, intermediate intrusives of the Cooke's Range (Oligocene), and other intermediate to felsic dikes and plugs of Eocene and Oligocene age Paleogenesedimentary units; includes Baca, Galisteo, Love Ranch, and Lobo Formations. (Equivalent to Eagar Formation in east-centralArizona) SanJoseFormation;Eocene,Sanfuan Basin Nacimiento Formation; Paleocene, San Juan Basin Poison Canyon Formation; Paleocene,in Raton Basin McRaeFormation, Cutter Sag-Engle Basin area Olo Alamo Formation, in San fuan Basin Animas Formation, in northeast SanJuan Basin Raton Formation, in Raton Basin Andesitic volcanics Late Cretaceousand Paleogeneintrusive rocks Cretaceousrocks, undivided; in extreme southwestern area includes Ringbone Formation, which may extend into lower Tertiary Sedimentary and volcaniclastic sedimentary rocks; restricted to southwestem area latest Cretaceousintrusive rocks;restricted to Copper Flats area in Sierra County l,atest Cretaceousandesite flows; restricted to southwestern area Upper Cretaceous (Gulfian Series); undivided. Includes Virden Formation (Elston, 1960)in Virden area Vermeio Formation and Trinidad Sandstone Kirtland and Fruitland Formations; coaltrearing o ol Or 0p 11es f- tu8120Tr 0Tc oT! 0Tg od Tnb To Tlp TBf ob 0n Ov //=oTb el. To \-Ill "2, 0x Tuv Toa OTn Tnn Tv fc Tlv Tsi K Y TuL Tui Turf T1 Tli TIFf Tla Tpg l-'.;l l;-l Tn TK TKO' IKA Kkf Kvt l--*; Kav KDc Kl6 Kpn Kch K Knf KU it K i._ Kol Knf Kcc Kg $U Kbn KC Kdr K1 .J -l rTl .,[-T _ I ll*"1"1 =_l-,F;"-l Pdl Pdn Pn Psl Pc Ptv Pat Psn P0q Pz Pz .-;-S' Pso P Pys PP Pcp Pcb Pbc Pdm Pcc Py Pct Pay Ph Pps Pn P Ps M PPsc Plc -1t- MO MC pC *ffi OD 0c Na;l Mexico Geology Kpc Kls Kp. Knf Kmv Pictured Cliffs Sandstone;prominent cliffforming marine sandstone Lewis Shale Pierre Shaleand Niobrara Formation Fort Hays LimestoneMember of Niobrara Formation Mesaverde Group includes the Gallup Sandstone,Crerra'sse Canyon Formatiori, P o i n t L o o k o u t S a n d s t o n e ,M e n e f e e Formation, and Cliff House Sandstone Kch Cliff House Sandstone Klv La Ventana Tongue of the Cliff House Sandstone Kmf Menefee Formation; coal-bearing Point Lookout Sandstone; prominentcliffforming marine sandstone. In McKinley and Sandoval Counties. The lower Point Lookout, the Hosta Tongue, is separated from the main body by the Satan Tongue of the Mancos Shale. Crevasse Canyon Formation; coal-bearing Kpl Kcc Kg Gallup Sandstone; prominent diff{orming marine sandstone; locally includes the overlying D-Cross Tongui of the Mancos Shale Kmr Rio Salado Tongue of the Mancos Shale. Overiies Twowells Tongue of Dakota Sandstone; mapped only where Tres Hermanos Formation is presenb included with Dakota Sandstone is Kdr in Socorro County area Kpg Kth Kma Km Kdr Kdm Kd Kc Kgg Kgh Pescado Tongue of the Mancos Shale and Gallup Sandstone; in Zuni Basin only. Pescado is mostly of Juana Lopez age. Tres Hermanos Formation; (formerly designated as Iower Gallup Sandstone in the Zuni Basin) Mancos Shale Dakota Sandstone (inclusive of Twowells Tongue) and Rio Salado Tongue of the Mancos Shale Intertongued Dakota Mancos sequence of west central New Mefco; includes the Whitewater Arroyo Tongue of Mancos Shale and the Twowells Tongue of the Dakota Dakota Sandstone includes the main body-Oak Canyon, Cubero, and Paquate Tongues Carlile Shale; limited to northeastern area Graneros Shale and GreenhomFormation; limited to northeastem area Greenhorn Formation; limited to northeastern area. The upper member (Bridge Creek Ls.) can be traced into wesrem area. Graneros Shale; limited area Kdg Dakota Group of east-central and northeastern New Mexico; includes both Lower and Upper Cretaceous rocks Mancos Formation and Beartooth Quartzite; Mancos includes what was formerly referred to as Colorado Shale, which in turn may include equivalents of Tres Hermanos Formation KI Morrison Formation; upper Jurassic rocks in northern third of state Pct Cutler Formation; used in Nacimiento Mountains and Chama embayment only lz Zuni Sandstone; undivided equivalent of the Entrada and Cow Springs Sandstones; restricted to Zuni Basin. Homotaxial equivalent to the Entrada Sandstone as used in northeastern Arizona Ph Hueco Formation; Iimestone unit restricted to south central area Pb Bursum Foimation PP Undivided rocks San Rafael Group; includes rniddle Jurassic seouence of Entrada Formation and the Todilto, Beclabito. and Horse Mesa Members of the Wanakah Formation PPsc P Pm Sangre de Cristo Formation Isr T Tsc Tc Ts Santa Rosa and Chinle Formations Chinle Formation; locally Moenkopi Formation at base inc.ludes Santa Rosa Formation Paleozoic rocks, undivided Pr Rustler Formation; Ochoan-age siltstone, gypsum/ sandstone, and dolomite Psl Salado Formation; Ochoan-age evaporite sequence Pc Castile Formation; Ochoan-age dorninanfly anhydrite sequence Pat Artesia Group; Guadalupian-age shelf facies forming broad S-SE hending outcrop from Glorieta to Artesia area; includes Grayburg, Queen, Seven Rivers, Yates, and Tansill Formations Pty Ptq PPs Ps PcP Capitan Formation; upper Guadalupianage limestone (reef facies) Pcb Carlsbad Limestone; equivalent to Seven Rivers, Yates, and Tansill Formations Delaware Mountain Group; includes Brushy Canyon, Cherry Canyon and Bell Canyon Formations MD Mississippian and Devonian rocks, undivided; includes the Lake Valley Limestone of Mississippian age, and the Oflate, Sly Gap, Contadero, and Canutillo Formations in the northern Franklin Mountains M Mississippian rocks, undivided Mk Kelly Limestone; Counties Dp Percha Shale;Caballo Mountains area Cambrian through Silurian rocks, undivided Silurian and Ordovician rocks, undivided Ordovician and Cambrian rocks, undivided; includes Bliss Sandstone, El PasoFormation, and Montoya Group soe so oe Yi Yp Xm Bell Canyon Formation; basin faciessandstone, limestone, and shale Pcc Cherry Canyon Formation; basin faciessandstone, limestone, and shale Pbrc Brushy Canyon Formation; basin faciessandstone, limestone, and shale Xp Pts Goat Seep Formation; Guadalupian-age limestone and dolomite (reef facies) Xmo Psa San Andres Formation; limestone and dolomite with minor shale Pg Glorieta Sandstone; mature sandstone Y X Psg Pco PrP San Andres and Glorieta Formations Py Yeso Formation; sandstones, siltstones, anhydrite, gypsum/ halite, and dolomite Lower Cretaceous (Commanchean Series), undivided Pa Pys Jurassic rocks, undivided Pay Cutoff Shale; in Brokeoff Mountains only Victorio Peak Limestone; in Brokeoff Mountains only Abo Formation; red beds Yeso Formation and San Andres Formation undivided Abo and Yeso Formations undivided Panther Seep Formation Sandia Formation; predominately clastic unit (commonly arkosic) with minor black shales, and carbonate Lead Camp Formation Pbc quartz Madera Formation; in Sangre de Cristo Mountains includes Porvenir and Alarnitos Formations of Baltz and Myers (1984) Cambrian through Mississippian rocks, undivided; includes Bliss Sandstone (Cambrian and Ordovician), El Paso and Montova Formation Group (Ordovician); locally rocks of *vonian age, the Lake Valley Limestone and (Mississippian) Dewey Lake Formation; Ochoan-age red sandstone and siltstone Grayburg and Queen Formations. Sandstone, gypsum, anhydrite, dolomite, and red mudstone Pennsylvanian rocks, undivided r{€ Dewey Lake and Rustler Formations Yates and Tansill Formations. Sandstone, siltstone, limestone, dolomite, and anhydrite Permian and Pennsylvanian Plc Permian rocks, undivided Seven Rivers Formation. Gypsum, anhydrite, salt, dolomite, and siltstone to northeastern May 1990 Natt Mexico Geology Triassic rocks, undivided Pz P Pdr Pdl Moreno Hill Formation and Atarque Sandstone, in Salt Lake coal field and extreme southern Zuni basin Kgt Kbm |m Xms of Socorro and Sierra Precambrian mafic dikes; diabase, metadiabase,metadiorite mainly of Burro Mountains; age not well constrained Precambrian sedimentary rocks of the SacramentoMountains Precambrianplutonic rocks younger than 1600Ma Precambrian metamorphic rocks, dominantly felsic, age 1650-1700Ma Precambrianmetasedimentaryrocks, age 1650-1700Ma, basicallyequivalent to Hondo Group which includes up to 2000 m of quartzite and pelitic schist Precambrian plutonic rocks generally older than 1600Ma Precambrian metamorphic rocks, dominantly mafic, age 1726-17ffiMa Middle Proterozoic rocks, undi.fferentiated Early Proterozoicrocks, undifferentiated AlvinJ. Thompson Sigma (mathematics), and Sigma Delta Psi (athletic). He worked for United Verde Mining ComAlvin J. @efty) Thompson was the Direcpany, Phelps Dodge Copper Company,Davis tor of the New Mexico Bureau of Mines and Dunkirk Mines, and Hillside Mining ComMineral Resourcesfrom 1957to 1968.During pany in Ar2ona. During World War II, he his yearsof leadership,he developedthe me-- did research work at the Batelle Memorial tallurgical and chemical laboiatories at Institute in Columbus, Ohio, which included NMBMMR and was an active mineral-inservice on the War Metallurgy Committee of dustry,leader, professor, and metallurgical the National Academy of Sciencesand deresearcher.In the 1962-1964Annual Report velopment of new methods of extracting of NMBMMR, he wrote "... NewMexico must metalsfrom many types of ores. He taughl actively contribute to the promotion of its tor iive years at the University of Arizona mineral resources and take the lead in reand for eleven years at the New Mexico Insearch and development work if it is to atstitute of Mining and Technology,servingas tract proper and prudent growth. At the same chairman of thJMining and M6tallurgy"Detime_the State has a primary obligation to partment. From 1957to 1968he was Director seethat mineral developmentand utilization of the New Mexico Bureauof Mines and Minproceed with due regard to the best conser- eral Resources,retiring in 1968. vation practices . . . " Leftywas a metallurgMr. Thompson was a registered profesist, but he shongly supporteda broadmineral- sional engineer in New Mexico and Arizona resources and geologic program for New and had been a member of the American Mexico. Chemical Society,Societyof ProfessionalEn-Thompson Mr. was born fuly Z, 1903in g!neg1s,American Institute of Mining and I,{9 !!ty, Iowa, and passed away April 5, MetallurgicalEngineers,and the Association 1990.He is survived by his wife, Bettv S. of AmericanStateGeologists.He was a longThompson, and son, Riihard B. Thompion, time member of the New Mexico Mining Asas well as grandson, PrescottAlvin Thbmpsociation, serving as president and for many son. years on the Board of Directors, being EmerLefty receivedhis B.S. in1927and M.S. in itus Director after his retirement. He helped 1933from the University of Arizona and was establishand was past chairmanof the Cenhonored by the Univerdity with an Award of tral New Mexico S-ectionof AIME and chairMerit in 1960. He had honorary member- man of the New Mexico Mining Safety ships in Phi KappaPhi (scholastic), Oettapnt Advisory Committee. (1e03_1se(l) and South America. In 7946, he was appointed Professor of Economic Geology at Indiana Universitv, and from there cam-eto New Mexico and NMBMMR. In earlv 1952, he servedas internationalconsultantboHaile -!uge1e Callaghanwas the eighth Director of the New Mexico Bureauof Mines and MinMines Corporation, Deliew, Cather and eral Resourcesdivision of New Mexico InCompan, and other firms doing geologic stitute of Mining and Technology, serving work in Cuba, Mexico, Canada,Tur[ev, aird from September 1949through fanirary 195/ Iran. From 1.958throueh 1965he was-Chief He expanded the Bureau from a staff of ten Geologistfor the Cypris Mines Corporation to thirty-one employeesand beganmany of working in Cyprui,'Greece, Israel,'Arabia, the geology and mineral-resourieprogrims Spain, Portugal,and Morocco. in place today, with heavy emphasison field In 1965, Dr. Callaghan joined the Utah geologic mapping. Dr. Callaghan was active Geologicaland Mineil Survey as Associate in the Association of American State GeolDirector, and in 1968he becamea professor ogists (AASG), serving as Statisticianand and the first chairman of the ne*ly orgahosting AASC in Socorroin 1954.He was nized Ceology and GeophysicsDepartmdnt elected Honorary Member of AASG as well of the Univdisity of Ut;h.-He retired from as of the New Mexico GeologicalSociery public service ii 1972. (NMGS) and the Utah GeologicalAssociaAJter retirement, Dr. Callaghancontinued tion. Eugene strongly supported the annual geologic consulting and attending professpring meetings and fall field conferencesof sronal conferencesin such diverse areasas NMGS, beginning the close cooperation beChina, Australia, Antarctica, Ireland, Scottween NMBMMR and NMGS. land, and Kenya.He frequentlyattendedthe Dr. Callaghan was born in Snohomish, annual meetingsof the Association of AmerWash_ington,and raised in Newport, Orei c a n S t a t e G e o l o g i s t sa t v a r i o u s s i t e s gon. He married Edna Curtis Spenkerof San throughout the nati,on. Francisco;they raised two sons, Curtis John Dr. Callaghan was a Fellow of AIME, GeoCallaghan, now in Petropolis, Brazil, and Dr. logical Societyof America, and the Sociefy William S. Callaghan, Salt Lake City. of EconomicGeologists.He publishedabotit Dr. Callaghanreceivedhis B.A. aha U.a. 60.scientific,reportibut also had many proin geology-from the University of Oregon prietary studies and maps that were nol puband his Ph.D. in geology froh Colunibia lished. The published reports are mainly on University in 1931.He w=orkedfor the U.S. areasin Utah, Nevada,and New Mexico, but GeologicalSurvey until 1946,doing proiects his experienceand knowledge spanned seven in Utah, Nevada,Massachusetts.pueito Rico. continents. Eugene Gallaghan (1904_1990) Lefty was an avid mineral collectorand his specimens include some magnificent pieces of smithsonite from the world-famous Kelly mine in the Magdalenamining district, central New Mexico. He oversaw the transfer of New Mexico Tech's Mineral Museum from the basement of Brown Hall, the administration building, to four largebays in the new (in 1958)wing of Workman Center, where it becamethe responsibility of NMBMMR. With his encouragement,the Mineral Museum assembled one of the more significant collections in the Southwest. As Director of NMBMMR, he was fiscally conservative, as required by the times, but he encouraged and supported new ideas and new projects that helped development of the State'smineral resources. In addition to overseeing projects, he personally wrote some 17 published reports including three on silver, lead, and zinc deposits of New Mexico. As evidencedby his membership in Sigma Delta Psi, Lefty was an active athlete. During the middle 60'she was the most skilled mem-ber of a doubles handball team that twice won the New Mexico Tech campus championship, playing against tall vigorous juniors and seniors.After his retirement in 1968. he had considerablymore time to play tennis, which he did almostevery moming, often with his wife Betty. Some of his last active momentswere on the tenniscourt. AnAlvin j. Thompson ScholarshipFund has been established at New Mexico Tech in his honor. A moderately tall, lanky man, Eugene set a fast.pace in the field and had penitrating questions concerning interpretation of outcrops. He was a living exampleof the axiom that the best geologistsare those who see the most rocks. He directed by leading and working closelywith his staff. He was always a perfect gentlemanand was sympatheticbut firm. With obvious reference to the Irish background of the name Callaghan,many of his friends called him Pat, but that referred to the good qualitiesof the lrish. In meeting deadlineshe tended to work thirty-six houri straight. Thus, after such a period, it was safest to insist on doing the driving, so he co rld catch up on his sleep as a passenger and not as the driver. Overall, he had encompassing appreciation for the many beneficial-aspectsof geologic studies, rdnging trom developing mineral resourcesto helping laypersonsenjoy the scenery that his resulted from geologic forces. A premier, practical economic geologist, he enthralled his students at Indiana and Utah universities with hands-on descriptions of Utah's Marysvale alunite, Nevada's Gabbs magnesite, Indiana's Gardner Ridge kaolin-haloysite, New Mexico's Santa ldta copper, tvteiico'i Santa Eulalia silver-lead, Cyprus' Skouriotissa copper, and Brazil's Minas Geraesdiamonds and hematite deposits. He left us January 8, 1990,two days before his 86th birthday. -Frank E. Kottlowski Nan Mexico Geology May 7990