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Unit Descriptions Kmc Kkf Kvt Sedimentary Igneous Kpc Qa Qe Qeg Qep Qd Qb Qv Pqm EXPLANATION FOR Kls Pqr Ql Qpl Qp QTt Qvr Pr Qbo Kch Supracrustal Intrusive Qoa Qr Kpn Psl QUATERNARY Qbt QUATERNARY QTp QTb Kmf Klv Pc TERTIARY QTs TERTIARY Zi Tpb Pty NEOPROTEROZOIC QTg QTsf Pcp Pbc Tus Tnb Tnr Tnv Pat Psr Kpl Kms To Pqg Pcc Ys Tfl Tsf Tlp Tmb Ku Kph Kmv Kmu Psa Ti Tim P Psg Pg Pco Yi K Kcc Kmm Knf Pz Psy MESOPROTEROZOIC Thb Tuau P˛ Py Pvp Yg Tuv Tc Tual Turf Turp Pct Pya Pau Kg Pa Ph P˛sc Tvs Tv Kpg Kgm Geologic Map of Km Pb Pal Tlrf Tlrp Tlv Xps Tla Kma Kc ˛ps ˛ ˛m Kth Kml Kgc Xg YXp ˛lc Xq Tsj ˛s Tps Kmb M PALEOPROTEROZOIC MD Xvf Xs Kmr Kgh D Tn MÇ Kdr Kgg TKpc TKi SO Toa TERTIARY Kgr Xvm Xpc TERTIARY TKpr TKa TKav UPPER CRETACEOUS Kmd Kd OÇ OÇp CRETACEOUS CRETACEOUS TKr LOWER CRETACEOUS Kdg SOÇ New Mexico Kl 1:500,000 DESCRIPTION OF MAP UNITS QUATERNARY CRETACEOUS PALEOZOIC PROTEROZOIC Upper middle Tertiary basaltic andesites and andesites of the Mogollon Pescado Tongue of the Mancos Shale and Gallup Sandstone Qa Alluvium (Holocene to upper Pleistocene) Tuau K Cretaceous rocks, undivided Kpg Pz Paleozoic rocks, undivided Zi Neoproterozoic mafic dikes—Exposed in Taos Range Group (lower Miocene and uppermost Oligocene, 22–26 Ma)—Includes (Turonian)—In Zuni Basin only; Pescado is chronostratigraphic equivalent New Mexico Bureau of Geology and Mineral Resources Bearwallow Mountain Andesite and basaltic andesite of Mangas of Juana Lopez Member of Mancos Shale Landslide deposits and colluvium (Holocene to Pleistocene)—Landslide Upper Cretaceous rocks of southwestern New Mexico, undivided P Permian rocks, undivided Mesoproterozoic mafic dikes, diabase, metadiabase, metadiorite— Ql Mountain; also near vent basaltic lavas and shallow intrusions in the Ku Yi deposits on western flanks of Socorro Mountains not shown for clarity (Maastrichtian to Cenomanian for most part, although Beartooth and Mainly in Burro Mountains; age not well constrained Chuska Mountains Tres Hermanos Formation (Turonian) — Formerly designated as lower Sarten Formations are in part Albian) — Includes Virden Formation in Kth Pqm Quartermaster Formation (Upper Permian)—Red sandstone and siltstone Gallup Sandstone in the Zuni Basin Celebrating 75 Years of Service Lacustrine and playa deposits (Holocene)—Includes associated alluvial northern Hidalgo County, Ringbone Formation in Hidalgo, Luna, and Mesoproterozoic sedimentary rocks—Exposed in Sacramento Mountains, Qpl Lower-upper middle Tertiary basaltic andesites and andesites of the Ys and eolian deposits of major lake basins Tual Grant Counties, Beartooth and Sarten Formations in Luna and Grant Pqr Quartermaster and Rustler Formations (Upper Permian) present in subsurface in southeastern New Mexico as De Baca Group Mogollon Group (upper Oligocene, 26–29 Ma)—Includes La Jara Peak Moreno Hill Formation and Atarque Sandstone (Turonian) — In Salt Counties, Mancos Shale in Silver City area Kma Basaltic Andesite, Uvas Basaltic Andesite, basaltic andesites of Poverty Creek Lake coal field and extreme southern Zuni Basin Piedmont alluvial deposits (Holocene to lower Pleistocene)—Includes Rustler Formation (Upper Permian)—Siltstone, gypsum, sandstone, and Mesoproterozoic granitic plutonic rocks—Mainly 1.45–1.35 Ga Qp and Twin Peaks, Squirrel Springs Canyon Andesite, Razorback Basalt, Bear Pr Yg deposits of higher gradient tributaries bordering major stream valleys, Kmc McRae Formation (Maastrichtian)—Engle Basin–Cutter sag area dolomite megacrystic granites, generally weakly foliated except locally at their A DIVISION OF NEW MEXICO INSTITUTE OF MINING AND TECHNOLOGY Springs Basalt, flows of Gila Flat, Salt Creek Formation, Middle Mountain Mancos Shale (Cenomanian to Campanian)—Divided into upper and alluvial veneers of the piedmont slope, and alluvial fans. May locally Km margins Formation, and the Alum Mountain Group. Pre-Amalia-Tuff lavas in the Questa lower parts by Gallup Sandstone include uppermost Pliocene deposits Vermejo Formation and Trinidad Sandstone (Maastrichtian to Salado Formation (Upper Permian) — Evaporite sequence, dominantly caldera are dominantly silicic andesites and dacites; elsewhere silicic Kvt Psl Campanian) halite YXp Mesoproterozoic and Paleoproterozoic plutonic rocks, undivided lavas are a minor component of Tual Kmu Mancos Shale, upper part (Campanian to Coniacian) Peter A. Scholle, State Geologist Qe Eolian deposits (Holocene to middle Pleistocene) Kirtland and Fruitland Formations (Campanian)—Coal-bearing, primarily Pc Castile Formation (Upper Permian) — Dominantly anhydrite sequence Paleoproterozoic granitic plutonic rocks—Variably foliated granites and Middle Tertiary volcaniclastic sedimentary units (Oligocene to upper Kkf Kml Mancos Shale, lower part (Turonian and Cenomanian) Xg Qeg Gypsiferous eolian deposits (Holocene to middle Pleistocene) Tvs in the Fruitland granitic gneisses; 1.71–1.65 Ga in northern New Mexico; 1.66–1.65 Ga Eocene)-- Mostly syneruptive volcaniclastic sedimentary aprons. Lower Artesia Group (Guadalupian)—Shelf facies forming broad south-southeast in central and southern New Mexico units dominantly derived from volcanic highlands of andesitic to dacitic Dakota Sandstone (Cenomanian) and Rio Salado Tongue of the Pat 2003 Eolian and piedmont deposits (Holocene to middle Pleistocene)— Pictured Cliffs Sandstone (Campanian)—Prominent, cliff-forming marine Kdr trending outcrop from Glorieta to Artesia area; includes Tansill, Yates, Qep composition. Locally includes minor lavas and tuffs. Younger units (above Kpc Mancos Shale—In northwest Socorro County locally includes overlying Interlayed eolian sands and piedmont-slope deposits along the eastern sandstone Seven Rivers, Queen and Grayburg Formations (Guadalupian). May Paleoproterozoic pelitic schist—Includes Rinconada Formation in northern and intertongued with Mogollon Group tuffs, Turp) include upper Bell Tres Hermanos Formation Xps olo flank of the Pecos River valley, primarily between Roswell and Carlsbad. locally include Moenkopi Formation (Triassic) at top New Mexico and Blue Springs Schist in Manzano Mountains f Ge gy an Top Formation, South Crosby Peak Formation, and upper Spears Group u o d M Typically capped by thin eolian deposits Kls Lewis Shale (Campanian)—Marine shale and mudstone ea in ur e units near Quemado. Older units (below and intertongued with Datil Greenhorn Formation and Carlile Shale, undivided (Turonian to B ra Kgc Tansill and Yates Formations (Guadalupian) — Sandstone, siltstone, Paleoproterozoic quartzite—Includes 1.70 Ga Ortega Quartzite and l Group tuffs, Tlrp) include Palm Park, lower Bell Top, Espinaso and Pueblo Cenomanian)—Locally includes Graneros Shale Pty Xq ~ o R ic e Qd Glacial deposits; till and outwash (upper to middle Pleistocene) Kpn Pierre Shale and Niobrara Formation (Campanian to Coniacian) limestone, dolomite, and anhydrite equivalents in northern New Mexico and 1.67 Ga quartzites in central x ~ s Creek Formations and lower Spears Group formations such as Rincon e o New Mexico M u Windmill, Chavez Canyon, and Dog Springs Kc Carlile Shale (Turonian)—Limited to northeastern area r c Older alluvial deposits of upland plains and piedmont areas, and Fort Hays Limestone Member of Niobrara Formation (Coniacian to Seven Rivers Formation (Guadalupian) — Gypsum, anhydrite, salt, w e Qoa Knf Psr e EW EXICO ECH s calcic soils and eolian cover sediments of High Plains region (middle Turonian) dolomite, and siltstone Paleoproterozoic metasedimentary rocks—Pelitic schist, quartz-muscovite N N M T Upper middle Tertiary rhyolitic lavas and local tuffs (upper Oligocene, Greenhorn Formation and Graneros Shale (Turonian and Cenomanian)— Xs to lower Pleistocene)—Includes scattered lacustrine, playa, and alluvial Turf Kgg schist, immature quartzite, and subordinate amphibolite; includes parts of 24–29 Ma)—Includes Taylor Creek Rhyolite, Fanney Rhyolite, rhyolite of Rocky Limited to northeastern area E deposits of the Tahoka, Double Tanks, Tule, Blackwater Draw, and Gatuña Mesaverde Group (Campanian to Turonian) — Includes Cliff House Queen and Grayburg Formations (Guadalupian)—Sandstone, gypsum, Vadito Group in northern New Mexico, immature metasedimentary rocks a y Canyon, rhyolite of Hardy Ridge, and upper rhyolite members of the Luis Lopez Kmv Pqg rt ur Formations, the latter of which may be Pliocene at base; outcrops, however, Sandstone, Menefee Formation and Point Lookout Sandstone. anhydrite, dolomite, and red mudstone of central New Mexico, and Bullard Peak Series mixed supracrustal rocks h S nt and Sawmill Canyon formations Greenhorn Formation (Turonian to Cenomanian)—Limited to northeastern cie t Ce are basically of Quaternary deposits Kgh in Burro Mountains nce for the 21s area; the upper member (Bridge Creek Limestone Member) can be traced Kch Cliff House Sandstone (Campanian)—Transgressive marine sandstone Pcp Capitan Formation (Guadalupian)—Limestone (reef facies) Lower middle Tertiary rhyolitic lavas and local tuffs (lower Oligocene to into western area where it is commonly shown as a bed-rank unit in Basaltic to andesitic lava flows (Holocene to middle Pleistocene)—Flows Tlrf Paleoproterozoic rhyolite and felsic volcanic schist —Includes 1.70 Ga Qb upper Eocene, 36–31 Ma)—Includes Mimbres Peak Formation, rhyolite of Mancos Shale on detailed maps Xvf south of Grants and west of Carrizozo are Holocene. Includes minor vent Klv La Ventana Tongue of the Cliff House Sandstone (Turonian) Bell Canyon Formation (Guadalupian) — Basin facies — sandstone, Vadito Group in northern New Mexico and 1.68 Ga
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