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Proposedlegend and correlation ol map units forrevised state geologic map by OrinJ. Andersonand Glen E. Jones, New Mexico Bureau of Minesand Mineral Resources, Socono, NM 87801 This correlation and description of geo- Formations; uppermost Mocene to middle Tlrp Lower Oligocene rhyolitic pyroclastic rocks logic units is proposed for the next edilion Pleistocene (ash-flow tuffs); includes Hell's Mesa, of the state geologic map. Digitizing of geo- Kneeling Nun, parts of the Bell Top logic maps,-totn-aetait-ea(6rge-scile;"ana Tg Lower part of Gila Group; uppermost Formation, Caballo Blanco,DatilWell, Rock regional (small-scale),published since 1955 Oligocene, Miocene, and lower Pliocene House Canyon and BIue Canyon Tuffs, is underway at the New Mexico Bureau of Tsf Lower and middle Santa Fe Group. and other volcanic and interbedded volcaniclastic units (e.g. Mines and Mineral Resources.If you wish Includes Havner Ranch, Rincon Vallev. SpearsFormation) Popotosa, formerly referred to as Datil Group to comment on any aspect of the map proj- Cochiti, Tesuque, Chamiti, Abiquiu, and Los Pinos Formations; Tla (Eocene ect, including the units and descriptions Lower Tertiarv, and lower uppermost Oligoceneand Miocene Oligocene)andeiite and basalticandesite shown here, please write to: Upper Tertiary sedimentary flows, and associatedvolcaniclastic units. State Geologic Map Committee units of ColoradoPlateau region, undivided;may Includes Rubio Peak Formation New Mexico Bureau of Mines and Mineral locally include FencELake and Bidahochi Turf Upper Oligocene rhyolitic flows and Resources Formations of the Little Colorado Basin, masses Campus Station and Gila Group in the northern Mogollon- Tlrf Lower Oligocene rhyolitic flows and Socorro, NM 87801 Datil volcanic field masses Tbi Bidahochi Formation; alluvial, lacustrine, Ti Tertiary intrusive rocks; undifferentiated Qa Alluvium; upper and middle eolian, and spring depositsof southern Quaternary Tui Miocene to Oligocene rhyolitic to Colorado Phteau region; middle(?) Ql Landslide deposits and colluvium; intermediate dikes, masses, plugs, and Miocene to lower Pliocene Quaternary diatremes Tfl Fence Lake Formation; coarse alluvial Qe Eolian deposits; Quaternary Tuim Middle Tertiary mafic intrusive rocks deposits with minor eolian facies and Qeg Gypsiferous eolian deposits; Quaternary pedogenic carbonates, of the southern Tli Quartz monzonites (Eocene)in the Silver Glacial deposits; Qd till and outwash; upper ColoradoPlateau region; mainly Miocene, City area and Los Pinos Range, and middle Pleistocene (baseprobably upp6rmost Olifocene) intermediate intrusives of the Cooke's Lacustrine,playa{ake,eolianandalluvial Range (Oligocene), and other intermediate Qx To Ogallala Formation, alluvial and eolian deposits to felsic dikes and plugs of Eocene and of maior lake basins;upper deposits, and petrocalcic soils of Great Oligocene age Quaternary Plans province; middle Miocene to lower Tps Paleogenesedimentary Qp Piedmont alluvial deposits; upper and Pliocene (locally includes unit QTe) units; includes middle Baca, Galisteo, Love Ranch, and Lobo Quaternary;indudes alluvial fan Tln Los Pinos Formation (lower Santa Fe deposits Formations. (Equivalent to Eagar bordering major streamvalleys Group); includes Carson Conglomerate Formation in east-centralArizona) Qb Basalt and andesite flows and vent (Dane and Bachman, 1965) in Tusas deposits; Quatemary Mountains.-SanLuis Basin area Tsi SanJose Formation; Eocene, San fuan Basin Qr Silicic volcanics;Quaternary Tos Mostly Oligocene and upper Eocene Tn Nacimiento Formation; Paleocene, San Basin Qv Basalticvolcanics; tuff rings, cinders, and sedimentary units, dominantlv Juan lavas; Quaternary volcaniclastic with local intermediatL Tpc Poison Canyon Formation; Paleocene,in volcanics; Raton Basin Qbo Basalts of North Plains area; lower and includes Espinaso,Spears, middle Pleistocene Monument ParkSandstone, and PalmPark Formations TKrn McRaeFormation, Cutter Sag-Engle Basin QTb Basaltic and andesitic volcanics Tnb Basalt and andesite flows; Neogene. area interbedded Includes flows interbedded with Pliocene and Pleistocene with SantaFe TKoa Olo Alamo Formation, in San fuan Basin sedimentary units and Gila Groups TKa Animas Formation, in northeast SanJuan QTa Older alluvial deposits; of upland plains Tnr Silicic volcanic rocks; Neogene Basin areas, mid-Pleistoceneto mid-Pliocene Tc Chuska Sandstone; limited to Chuska TKr Raton Formation, in Raton Basin Silicic flows and domes Mountains, in northwest QTr interbedded with TKav Andesitic volcanics Plioceneand Pleistocenesedirnentary units Tv Middle Tertiary volcanic rocks, TKi Late Cretaceousand Paleogeneintrusive Older eolian cover sediments and undifferentiated QTe calcic rocks 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 K Cretaceousrocks, undivided; in extreme recent Lower Oligocene and Eocenevolcanic dune-sandsdeposits (e.g. Tahoka,Double southwestern area includes Ringbone rocks, undifferentiated (dominantly silicic); Lakes,Tule, and Formation, which may extend into lower BlancoFormations of the rocks 32 Ma and older Southem High Plains area); upper Pli- Tertiary Tuau Uppermost Oligoceneand lower ocene and Pleistocene Miocene Ksv Sedimentary and volcaniclastic andesitic rocks (26-18 Ma). Includes Bear Gila Group. sedimentary rocks; restricted to QTg Includes Mimbres Formation Wallow Mountain Formation (Plio-Pleistocene)and several unnamed southwestem area Tual Upper Oligocene andesitic rocks (31-26 units in southwestem intermontane basins; Ki latest Cretaceousintrusive rocks; restricted Ma); includes Uvas Basalt and Poverty Miocene to middle Pleistocene (base to Copper Flats area in Sierra County Creekbasaltic andesite probably uppermost Oligocene) Ka l,atest Cretaceousandesite flows; restricted Turp Upper Oligocene rhyolitic QTgu Upper Gila Group; uppermostMiocene to pyroclastic rocks to southwestern area (ash-flow tuffs); includes South Crosby Pleistocene Ku Upper Cretaceous (Gulfian Peak Formation, La Jencia, Vick's Peali, Series); QTsf SantaFe Group, undivided. Intermontane undivided. Includes Virden Lemitar, La JaraPeak, South Canyon Tuff, Formation basin fill of Rio Grande (Elston, rift region; Bloodgood Canyon Tuff, Shelley Peak, 1960)in Virden area uppermost Oligocene to middle Pleistocene Turkey Springs, Tuff of Little Mineral Kvt Vermeio Formation and Trinidad QTs Upper Santa Fe Group. lncludes Camp Creek, and others. Some contain Sandstone Rice, Fort Hancock, Palomas, Sierrl volcaniclasticand reworked volcaniclastic Kkf Kirtland and Fruitland Formations; coal- Ladrones, Ancha, Puye, and Alamosa rocks. trearing May 1990 New Mexio Geology Or ol 0p o 0x "2, od ob 0n Ov //=- oT! 0Tc f- 11es 0Tg oTb OTn 0Tr el. Tnb Tnn tu812 To Tlp TuL To TBf \-Ill Tui Tuv Turf Toa Tv K T1 Tli fc TIFf Tlv Y Tsi Tla Tpg Tn l-'.;l TK TKO' IKA l;-l l--*; Kkf Kav Kvt KDc Kl6 Kpn Kch Knf K KU K Kol Knf Kcc it Kg KC i._ $U Kbn Kdr K1 -l rTl .J .,[-T I _ ll*"1"1 =_l-,F;"-l Pdl Pdn Pn Psl Pc Ptv Pcp Pcb Pbc Pat Psn Pdm P0q Pcc P Pso .-;-S' Pys Pz PP Py Pz Pct Pay Ph PPsc Pps P Pn Ps Plc -1t- M MO MC OD 0c pC *ffi Na;l Mexico Geology Kpc Pictured Cliffs Sandstone;prominent cliff- |m Morrison Formation; upper Jurassic rocks Pct Cutler Formation; used in Nacimiento forming marine sandstone in northern third of state Mountains and Chama embayment only Kls Lewis Shale lz Zuni Sandstone; undivided equivalent of Ph Hueco Formation; Iimestone unit restricted Kp. Pierre Shaleand Niobrara Formation the Entrada and Cow Springs Sandstones; to south central area Knf Fort Hays LimestoneMember of Niobrara restricted to Zuni Basin. Homotaxial Pb Bursum Foimation equivalent to the Entrada Sandstone as Formation PP Undivided Permian and Pennsylvanian used in northeastern Arizona Kmv Mesaverde Group includes the Gallup rocks Rafael includes rniddle Sandstone,Crerra'sse Canyon Formatiori, Isr San Group; Jurassic PPsc Sangre de Cristo Formation seouence of Entrada Formation and the Point Lookout Sandstone,Menefee P Pennsylvanian rocks, undivided Formation, and Cliff House Sandstone Todilto, Beclabito. and Horse Mesa Members of the Wanakah Formation Pm Madera Formation; in Sangre de Cristo Kch Cliff House Sandstone Mountains includes Porvenir and Alarnitos Klv La Ventana Tongue of the Cliff House Formations of Baltz and Myers (1984) T Triassic rocks, undivided Sandstone PPs Panther Seep Formation Tsc Santa Rosa and Chinle Formations Kmf Menefee Formation; coal-bearing Ps Sandia Formation; predominately clastic inc.ludes Kpl Point Lookout Sandstone; prominentcliff- Tc Chinle Formation; locally unit (commonly arkosic) with minor black forming marine sandstone. In McKinley Moenkopi Formation at base shales, and carbonate Formation and Sandoval Counties. The lower Point Ts Santa Rosa Plc Lead Camp Formation Lookout, the Hosta Tongue, is separated r{€ Cambrian through Mississippian rocks, from the main body by the Satan Tongue Pz Paleozoic rocks, undivided undivided; includes Bliss Sandstone of the Mancos Shale. P Permian rocks, undivided (Cambrian and Ordovician), El Paso Kcc Crevasse Canyon Formation; coal-bearing Pdr Dewey Lake and Rustler Formations Formation and Montova Group Kg Gallup Sandstone; prominent diff{orming (Ordovician); locally rocks of *vonian age, Pdl Dewey Lake Formation; Ochoan-age red marine sandstone; locally includes the and the Lake Valley Limestone sandstone and siltstone overlying D-Cross
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