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Home , Alamosa Formation, Amalia Tuff, Animas Formation, Arroyo Formation, Beaver Dam Mountains, Browns Park Formation

Index [Italic page numbers indicate major references]

A , 44, 53 Boquillas Formation, 290 Acadian orogeny, 85 Animas uplift, 234, 235 Brazos uplift, 53 Abbe Springs Basin, , 11 apatite fission-track ages, 127, 143 Browns Park Basin, 6, 8 , 114 Arroyo Montosa, dacite, 11 , 8 , 193, 195, 227, 234 Arroyo Seco, 61 Brushy Basin Member, Morrison Abo Pass, 101, 132 ash flows, 11 Formation, 196 accommodation zones, 6, 14, 52, 101 ash-flow sheets, 9 Buff Member, Sante Fe Formation, 16 See also specific accommodation ash-flow tuffs, 39, 45 Burro Mesa, 290 zones Conejos Formation, 45 Burro Mesa fault zone, 290 Alamosa basin, 39, 42 Ash Hollow fauna, 17 Burro Mesa , 290 , 16, 30, 46, 48 Atrisco well, 76, 78 , 193 Alamosa horst, 29, 35, 40, 46, 53 Alazan , 294 B C , 1, 6, 84, 168, 187, 188, 202 Baca basin, 12, 158, 161 Caballo fault, 265, 273, 278, 279, 280 amphibolites, 87 Baca Formation, 73, 75, 76, 87, 113, , 247 depositional history, 73, 80 118, 141, 143, 158, 196, 199, Cabezon sag, 194 extension, 2, 5, 9, 101 200, 208 calcite, Cuchillo Negro volcanic faults, 59, 90, 97 Baca graben, 40 complex, 231 geologic framework, 87 , 46 , 16, 257, 258, geometry, 12 tilting, 51, 53 259, 262, 268, 270, 277, 279 gneisses, 87, 101 Badwater, Death Valley, California, 32 Campo Grande fault, 265, 273, 275, gravity data, 174 Balluco gravel, 270, 279 278, 279, 280 greenstones, 87 Bandelier , 61, 161 Carpenter Ridge Tuff, 45, 54 metarhyolites, 87 dacite, 12 Carrizo Arroyo, 120 normal faults, 125, 126 flows, 9 Carrizozo, , 248 northern, 115 basaltic , Cuchillo Negro Carthage-La Joy a basin, 76, 80, 161 onset of rifting, 11 volcanic complex, 231 Castolon graben, 283, 285, 286, 287, phyllites, 87 of Poverty Creek, 290, 294, 295 quartzites, 87, 101 231, 234 Cat Mesa fault, 97, 120 rift shoulder uplifts, 125, 126 Basin and Range province, 136, 207 Cedar Hill, 257, 262 sandstone petrology, 73 southern, 151, 158, 265, 267 Ceja Member, Sante Fe , 16, 79 schists, 87, 101 Bear Mountains, 158, 162 Cenozoic seismic reflection data, 125 Bearwallow Mountain Formation, 234 Albuquerque Basin, 73, 83, 87 southern, 120 Beaver Dam Mountains, 150 climate change, 5, 20 Belen half graben, 150 en echelon structures, 8 stratigraphy, 73, 75,87, 113 Bell Top 4 tuff, 229 epeirogenic uplift, 17, 18 structure, 83, 90 Bernalillo, flora, 17 extension, 84 tectonics, 83 Bidahochi Formation, 5, 20 extensional collapse, 8 volcanism, 87 Big Bend National Park, 283 Hueco bolson, 268 wells, 74, 76, 120, 125 Big Bend region, west , 1, 3 left-lateral offsets, 8 Albuquerque-Belen Basin, 135, 140, Big Bend segment, Trans-Pecos, normal faults, 6, 8 146, 152 stratigraphy, 158, 268 shoulder uplifts, 150 Texas, 283 volcanic activity, 83 Albuquerque Bench, 120 biotite, Alamosa basin, 42 volcanism, 87 alluvial fans, Sangre de Cristo Black Butte, 78 Black Gap graben, 283, 285, 292, 295 Cerro Castellas, 291 Mountains, 33 Black Mountains, 5, 149 Cerro fault, 143, 146, 149, alluvium, 79 , 227, 231, 233, 234, Alvarado Ridge, 17, 20 150, 166 235, 236, 237, 239 Amaco-Mapco 1-32 State well, 30, 34, Cerro Mai Nombre, 293 Black Range uplift, 236 36 Cerros del Rio basalt field, 62, 68 massif, 51, 55 , 9, 11, 28, 54 Cerros del Rio , 62 Blanco Basin Formation, 34, 42, 46, Amargosa fault, 265, 277, 278, 280 Chalk Draw fault, 290, 292, 293 53 amphibole, Alamosa basin, 42 Chama-El Rito Formation, 16 amphibolite redbeds, 39, 42 Chamita Formation, 61, 62 seismic reflections, 48 Alamosa basin, 42 chert, 76, 77, 80, 270 wells, 44 Albuquerque Basin, 87 , Mexico, 1, 3, 158, 265, Blue Ribbon transverse zone, 293 Ancha Formation, 16 267, 283, 285, 290, 293, 295 Bofecillos eruptive center, 290 andesite, 270 Chihuahua tectonic belt, 267 Bofecillos Mountains, 285, 295 Conejos Formation, 44 Chihuahua trough, 267, 268, 287, Bonanza Tuff, 44 290, 295 Silver Creek, 11, 13, 14 Boquillas Canyon, 292 , 265 Winston graben, 234

299

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Chimayo, New Mexico, 61 detachment faults, 136 Fish Canyon Tuff, 45 Chinati Mountains, 289 dikes, 8 fission-track dating, 6 , 143, 145 Dog Canyon, 292 Florissant flora, 17, 18 Chise lineament, 227, 235 Dona Ana Mountains, 257, 262 Florissant Lake Beds, Colorado, 17, 18 Chisos Mountains, 291 Dry Union Formation, 17, 48 fluviolacustrine deposits, 8 Chloride mining district, 236, 238 Dugout Wells, 291 footwall uplift, 136, 149, 150 Christmas Mountains, 291 Fort Hancock Formation, 268, 270, Cichillo Negro volcanic complex, 279 E 229, 231 Circle Bar Basin, 8 East African rift lakes, 105 Alamosa Formation, 48 claystone, 76, 77 East African rift system, 9, 137, 237, flora, 6, 17, 18 Conejos Formation, 44 285, 286, 287 Fort Hancock Formation, 270 lower Sante Fe Group, 46, 50 East Boundary fault, Franklin Winston graben, 234 Clint fault, 268, 275 Mountains, 277 Franklin Mountains, 168, 273 Coahuila, Mexico, 3, 283, 285, 290, East Franklin Mountains fault, 265, , , 18 292, 295 277, 280 coal, 76, 196 East Joyito fault, 187, 188, 189, 193, G Cobb Mountains, 233 197, 199, 200 COCORP data, 101, 105, 136, 138, , 168 Gabaldon Badlands, 80 142 East Robledo fault, 257, 258, 259, Gabaldon fault, 120 , 9, 87, 135, 140, 263 , 15, 20 148, 207, 209 Echo Park Alluvium, 42 Galisteo-El Rito basin, 76, 80 Colorado Plateau block, 84, 90, 101 Echo Park Formation, 43 , 17, 73, 75, 76, Colorado sag, 53 El Paso, Texas, 3, 84, 87, 267, 268 87, 90, 113, 118 Comanche fault, 90, 140, 142, 145, El Valle de La Joya, 188, 196, 199, Gallup Sandstone, 196 147, 148, 151 200 geometry Comanche-Jeter fault system, 151, 152 Eldorado Moumtains, Nevada, 15 basin, 11, 51, 241 Conejos Formation, 34, 39, 44, 46, Embudo accommodation zone, 15 structural, 27 48, 53 Embudo constriction, New Mexico, Gila Conglomerate, 233, 234 conglomerate 40 Gills gravel, 270 , 196 Embudo fault zone, 12, 14, 15, 59, 61 Glorieta Formation, 196 , 28 Emory , 229 , 142, 145 San Pedro Arroyo Formation, 196 Emory Peak, 290 gneiss Sante Fe Group, 113, 234 Engle basin, 236, 237, 241, 250 Alamosa basin, 42 Consortium for Continental Reflection epeirogenic uplift, 6 Albuquerque Basin, 87, 101 Profiling. See COCORP data Española Basin, 84, 87, 168 Joyita Hills, 191 Continental fault, 8 geometry, 12 Goat Mountain, 291 cooling rates, 127, 130 onset of rifting, 11 Gold Hill surface, 273, 277 Corralitos basin, 257, 263 paleomagnetic rotations, 59 Goodsight-Cedar Hills area, 229 Corralitos Graben, 258 rotation, 1 Granby-Fraser Basin, 8 fault, 97, 132, 148, 150, 152 sediments, 68 granite, Alamosa basin, 42 Coyote-Loma Pelada faults, 151 Española block, 59 Granite Mountains, collapse, 8 Crevasse Canyon Formation, 143, 196 rotation, 66 Grapevine Hills, 291 crustal extension, ¡35 Española half graben, 12 gravity anomaly crustal shortening, 9, 20 Espinaso Formation, 79, 114 Pedernal uplift, 243 crustal structure, 241 Estancia Basin, 2, 171 Sacramento Mountains, 243 crustal thickening, 12, 20 faults, 174, 181, 184 gravity data, Mogollon-Datil volcanic Cuchillo Negro Creek, 229 seismic reflection profiles, 173 field, 211, 243 Cuchillo Negro volcanic complex, 231 wells, 174, 184 gravity profiles, 250 Culebra reentrant, 43, 52 Estufa graben, 291 -Colorado Plateau Euler pole of rotation, 5 boundary, 211 locations, 8 Great Plains, 84, 140 D Great Sand Dunes National Monument, dacite 27, 51, 52 F Abbe Springs Basin, 11 greenstones, Albuquerque Basin, 87 Bandelier Tuff, 12 fault scarps, 3, 141 Gribbles Park Tuff, onset of rifting, 9, Tschicoma Formation, 12 faulting, intrabasinal, 257 1 1 , 234 faults Grober well, 76 Dakota hogback, 18 Albuquerque Basin, 59, 90, 97 Dakota Sandstone, 196 Estancia Basin, 174, 181, 184 H Datil, New Mexico, 207 Hueco bolson, 273 Datil Group, 73, 114, 141, 161, 162 Joyita Hills, 189, 193, 194, 197, Hagan embayment, 168 , , 222 200 half , -Sierra , 19 Lemitar Mountains, 161, 162 Lucero area, 135 Del Curto fault zone, 187, 198, 203 Rocky Mountains, ancestral, 202 Hansen's Bluff, 48 Del Norte high, 43, 53 Winston graben, 227, 235 Hatch-Rincon basin, 260 Basin, 19 See also specific faults Hatch Siphon section, 260, 262 depth of rift, 27 feldspar, Joyita Hills, 191 Hells Mesa Tuff, 161, 200

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hematite, alamosa basin, 42 Ladron horst, 105, 135 Manzano-Los Pinos Mountains, 127 High Plains, Wyoming, 18 Ladron Mountains, 75, 87, 97, 101, Manzano-Los Pinos uplift, 114, 127 High Plains block, 90, 101 105, 143, 149, 158 , 80, 87, 90, 101, Hinsdale basalts, 46, 48, 54 Ladron Peak, 12, 133, 138, 140, 149, 172, 184 Holocene, late, fault scarp movement, 162 Manzano uplift, 132 3 elevation, 14 Mapco-Amoco well, 16 Hubbell Bench, 74, 127 extensional structures, 2 Marathon Basin, 292, 293 Huckleberry Ridge ash, 270 Ladron Peak-Sierra Lucero area, 135, Maravillas Creek, 292 Hueco basin, 287 141 Masonic Park Tuff, 45 Hueco bolson, 3, 265 accommodation zones, 135 Mesa Carriazo, 143 faults, 273 Ladron uplift, 114, 127, 132, 140, Mesa de Anguila, 290, 294 Hueco graben, 265, 273, 275, 278, 145, 152 Mesa Sarca fault, 149 279 geologic structure, 143 Mesilla basin, 257, 258, 260 Laguna bench, 90 metarhyolites, Albuquerque Basin, 87 Lake Bonneville, , 136 metasediment, Alamosa basin, 42 I Laramie Range, 18 methane, Alamosa Formation, 48 Inman Ranch, sandstone, 233 Las Animas graben, 227, 229, 233, micas, Alamosa basin, 42 Isleta #2. See Shell Isleta #2 well 235 microcline, 77 Las Cruces, New Mexico, 257 Alamosa basin, 42 Latir , 16 J Middle Park, Colorado, 8 lava, 14 Middle Red Member, Sante Fe Group, Jarita member, , Lava Creek B ash, 270 114 1 1 Leadville, Colorado, 6, 84 Milligan Gulch basin, 143, 148 Jemez lineament, 15, 209, 287 Lemitar Mountain block, 13, 14 Milligan Gulch half graben, 135, 148 , 75, 84, 87 Lemitar Mountains, 148 Mimbres Peak Formation, 231 volcanic rocks, 75, 61 extensional deformation, 157 extension, 1, 3, 6, 9, 13, 14, Jeter fault, 14, 90, 97, 101, 105, 114, stratigraphy, 158 16, 20, 140 126, 132, 140, 143, 145, 146, structure, 161 Miser gravel, 270 147, 149, 152 tilt history, 2 Moccasin John flow dome complex, Jornada del Muerto Basin, 246, 249, Lemitar Range, 13, 14 233 253, 257, 258, 262 Lemitar Tuff, 14, 200 Moccasin John Rhyolite, 233 creation, 242 , 75, 270 Moenkopi Formation, 196 Jornada fault, 257, 258, 259, 262 Joyita Hills, 191 Mogollon Plateau, 2, 208, 218, 222, Jornada I surface, 258, 278 lineaments, 15 236 Joyita Hills, 2, 191 Loma Pelada fault, 152, 162, 164 rhyolites, 222 faults, 189, 193, 194, 197, 200 Los Canoncitos. See Joyita Hills Mogollon Rim, 211 structural evolution, 187 Los Pinos fault, 114 Mogollon-Datil volcanic field tectonic evolution, 187 Los Pinos Formation, 16, 46, 54 (MDVF), 2, 13, 80, 161, 211, Joyita Hills block, 14 alluvial-fan deposits, 9 227, 229, 241, 248 Joyita uplift, 74, 76, 78, 184, 188 Los Pinos Mountains, 87, 90, 101 crustal structure, 207 Juarez, Mexico, 267 Love Ranch basin, 241, 250 gravity data, 211, 214, 243 Juglaus sp., 34 Lucero Arroyo, 257, 258, 259, 262 seismic refraction, 211 Junction Creek Formation, 42 Lucero basin, 187, 194 molluscs, Alamosa Formation, 48 Lucero monocline, 127 Momipites wyomingensis, 34 Lucero uplift, 12, 75, 80, 90, 114, Monte Largo Bench, 90, 105 K 120, 127, 135, 138, 140, 142, Monte Largo embayment, 138, 140, Kern Place surface, 273, 277 148, 750, 152, 187 142, 145, 146, 150, 151, 152 Kneeling Nun Tuff, 229, 231 geologic structure, 142 Monte Vista basin, 20 Luis Basin, south-, 27 Monte Vista graben, 35, 40, 42, 53 L redbeds, 43 M Montosa fault zone, 187, 198, 199, La Babia lineament, 290 200, 203 La Jara Peak Basaltic Andesite, 11, Madden gravel, 270, 278, 279 Montosa fault, 101, 173 114, 162, 200 Madera Formation, 192, 193, 227, Moonstone Formation, 8 La Jencia Basin, 13, 158, 161, 166 228, 234 Morenci, Arizona, 211, 245 La Jencia-Cerro Colorado fault zone, , 142, 145 Morenci-Dice Throw gravity field, 158, 162, 165, 166 Magdalena, New Mexico, 218 212, 214 La Jencia Creek, ancestral, 165 , 14, 158, 162, Morenci lineament, 15, 227, 235 La Jencia Fault, 149, 152 194 caldera, 45 La Jencia half graben, 13, 14, 135, Magdalena Peak volcanic center, lava, Mt. Taylor volcanic center, 87 148, 158 14 Muddy Mountains, 149 La Jencia Tuff, 161, 200 magnetic studies, 62 La Mesa surface, 270 magnetite, Cuchillo Negro volcanic Abo Formation, 195 lower, 258, 262 complex, 231 Blanco Basin Formation, 42 upper, 257, 258, 259 Mancos , 196 Moenkopi Formation, 196 Ladron block, 105, 127, 133, 140, Manzanita Mountains, 87 San Pedro Arroyo Formation, 196 143, 146, 149 Manzano block, 127 Sante Fe Group, 46, 50, 234 Ladron fault, 142, 146 Manzano fault, 114 Muehlberger model, 66

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Mule Creek caldera, New Mexico, 209 , 8 R Pecos-Picuris fault, 59, 90, 184 muscovite, Alamosa basin, 42 Ramey gravel, 270, 279 See also Picuris-Pecos fault Ranchos fault, 131 Pedernal Hills, 171, 184 N , 19 Pedernal Mountains, 172, 173 Red Mountain, Arizona, 209 Pedernal uplift, gravity anomaly, 243 Nacimiento fault, 203 Red River, New Mexico, 55 Peñasco uplift, 194 Nacimiento uplift, 75, 80, 87, 90 redbeds, Blanco Basin Formation, 42 perthite, 77 Nambé Member, , Redford basin, 289 61, 62 Alamosa basin, 42 Redford bolson, 289 Gap, 149 Phelos Dodge open-pit copper mine, Redford graben, 283, 285, 289, 292, Negros fault, 144, 148 211 293 phyllites, Albuquerque Basin, 87 reverse faults, 87, 101 faulting, 227, 236 Pichacho Mountain, 257, 258, 263 rhyolite rifting, 54, 125 Picuris Formation, 11 Cuchillo Negro volcanic complex, Nogal Canyon cauldron, 233 Picuris Mountains, 15, 182 231 North American craton, 9, 84, 210 Picuris-Pecos fault, 172, 173, 182, North Muddy Mountains, 149 184 Datil Mountains, 222 North Park Basin, 20 Mogollon Plateau, 222 See also Pecos-Picuris fault rift, defined, 9 , 8 Pine Canyon caldera, 291 North Park syncline, 8, 20 rifting, 54 plagioclase, 76, 77, 78, 80 onset, 9 Northeast Robledo section, 257, 258, Alamosa basin, 42 263 Riley, dike swarm, 152 Cuchillo Negro volcanic complex, Rincon Arroyo, 257, 258, 262 231 Rincon fault, 131 , 209, 223 O Rincon Hills, 262, 263 Plata subbasin, 293 Rincon Valley Formation, 262 Ocate volcanic field, 19 Platoro, Colorado, 44 , 48, 161, 273, 284, 285, , 5, 17, 18, 19 , sedimentation, 257 290, 292 deposition, 20 Plio-Pleistocene, 6, 9, 13 ancestral, 20, 73, 81, 114, 157, Ojo Caliente Formation, 16 , late, sedimentation, 257 158, 166, 258, 262, 263 Ojos Calientes, 285, 289 plutons, 8 Rio Grande fault, 90, 97, 113, 115, Pojoaque, New Mexico, 61 118, 126, 131 Poncha Pass, Colorado, 40, 48 late, 3, 6, 8, 11, 13, 20, 140, 157 , 237 Popotosa basin, 11, 162 volcanic rocks, 73 Rio Grande uplift, 241 extension, 13, 14 volcanism, 39, 54 Rio Grande Valley, 167 Orogrande basin, 194 geometry, 12, 13 entrenchment, 73 orthoclase, 77 volcanism, 13 Popotosa Formation, 13, 14, 79, 114, Rio Puerco, 120 Alamosa basin, 42 Rio Puerco block, 90 , volcanics, 59 121, 122, 142, 143, 157, 158, 161, 162, 164, 168 Rio Puerco fault, 14, 75, 80, 150 Oscura anticline, 173 Rio Salado, 144, 145, 158, 165, 168 ostracods, Alamosa Formation, 48 potassium feldspar, 76, 78, 80 ancestral, 165 Ouachita-Marathon orogeny, 173, Sante Fe Group, 114 Robledo block, 263 Poverty Creek basaltic andesite, 229 202, 294 , 263 Presidio basin, 289, 291, 295 Owl Creek Range, Wyoming, 90 Rock Springs uplift, 8 Presidio graben, 283, 285, 286, 287, Rocky Mountains, ancestral, 90, 171, 289, 292, 293 P 172, 182, 187, 194 Presidio transverse zone, 283 deformation, 190 Pacific to Arizona Crustal Experiment Presidio zone, 293, 294 faults, 202 (PACE), 211, 221 Puye Formation, 16, 62 development, 241 Pajarita fault zone, 12, 61 pyroxene, Cuchillo Negro volcanic Rocky Mountains, Southern, 9, 17, Pajarito-La Bajada-San Francisco- complex, 231 18, 53, 54, 84, 101 Sandia fault systems, 59 Rubio Peak Formation, 227, 228, 229 Pajarito Mountain, gravity high, 248 paleoelevations, 6, 18, 20 Q , Sante Fe Group, 73 quartz, 76, 77, 78, 80 S paleomagnetic poles, 66 Alamosa basin, 42 Sacramento Mountains, 194, 241, paleomagnetic rotations, 59 Blanco Basin Formation, 42 paleosols, 260 247, 250 Cuchillo Negro volcanic complex, gravity anomaly, 243 , Albuquerque Basin, 87 231 Saguache, Colorado, 53 Paloma fault, 101, 173 Joyita Hills, 191 Saiz fault, 140, 142, 145, 151 Palomas Basin, 167, 236, 237, 241, Zia Formation, 114 Saiz-Jeter fault system, 152 246, 247, 249, 250, 253, 258 , Conejos Formation, 44 Salta basin, 287 creation, 242 quartzites, Albuquerque Basin, 87, San Agustin arm, 13 Palomas Formation, 16, 233, 258 101 San Andres Formation, 142, 196 Palomas gravel, 233 , tectonics, 265, 277 San Andres Limestone, 145 palynomorphs, 34 Questa, New Mexico, 168 , 247, 250 Panamint Valley, southeast California, plutons, 8 San Andres transform fault, 141 136 Questa caldera, 9, 11 San Antonio pumice, 162 Park Plateau, 19 Quitman Mountains, 270, 273 San Diego Mountain, 168, 262, 263

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San Felipe fault belt, 74 (continued) Sierra del Caballo Muerto, 290 San Francisco fault, 131 claystone, 46, 50 Sierra del Carmen, 290, 292 San Francisco-Placitas fault, 97, 113, conglomerates, 39, 113, 234 , 289, 293 115, 126, 131 defined, 15 Sierra Ladrones Formation, 16, 79, San Juan Caldera complex, 45 granite, 114 114, 122, 142, 143, 146, 157, , 40, 80 lower, 46, 48, 50, 79, 80 158, 161, 162, 165, 166, 202, San Juan sag, 44, 54 mudstone, 39, 46, 50, 234 203 , 16, 30, 34, potassium feldspar, 114 Sierra Lucerò, 138, 142 39, 44, 45, 46, 51, 54, 208 quartzite, 114 , 208 San Luis Basin, 1, 6, 9, 34, 84, 168, sandstone, 39, 46, 113, 234 , 194, 202 290 sedimentary deposits, 12, 15, 16 Sierra Oscura, 249 angular , 9 sediments, 233 Sierra Ponce, 290 extension, 1, 3, 5, 9, 14 siltstone, 113 Sierra San Jose de Prisco, 278 geometry, 12 stratigraphic units, 16 Sierra uplift, 80, 158, 161 northern, 39 syn-rift deposits, 158 Sierra Vieja, 287 onset of rifting, 11 thickness, 113 siltstone, 196 stratigraphy, 39 upper, 46 Sante Fe Group, 113 tectonics, 39, 53 volcanic deposits, 15 Tesuque Formation, 16 San Luis-Brazos uplift, 39, 53, 54 volcanics, 113, 158 Silver Creek andesite, 158, 161 San Luis half graben, 17 wells, 46, 48, 115, 118 Silver Creek fault, 14, 157, 158, 162, San Luis Hills, 44, 48 Winston graben, 233, 238 164, 165, 166 San Luis Hills horst, 55 Santa Fe Range, 12 andesite, 11, 13, 14 San Luis uplift, 54 Santa Fe River, 62 Skull Ridge Member, Tesuque San Luis Valley, 28, 284 Santa Rita Canyon, 144, 145 Formation, 61 San Mateo basin, 194 Santa Rita fault, 143, 148, 152 Snake Range décollement, 136 San Mateo/Lucero basin, 194, 202 Santa Rita-Hanover axis, 236 Socorro, New Mexico, 3, 6, 84, 87, San Mateo Mountains, 168, 227 Santana caldera, 290 151, 158, 168, 247, 284 southern, 233 Santana eruptive center, 290 extension, 1, 3, 5 San Pedro Arroyo Formation, 196 Santana graben, 283, 285, 294 onset of rifting, 11 , 87 Santana tuff, 290 plutons, 8 Sandia fault, 113, 115, 118, 126, 131 Santiago Mountains, 292, 293 Socorro accommodation zone, 13, 14, , 192 Santo Domingo Basin, 84 15, 158, 164, 235 Sandia-Manzano-Los Pinos uplift, 74 , 19 Socorro Basin, 157, 158, 162, 165, Sandia-Manzano Mountains, 171 Scales Canyon, 233 167 , 12, 87, 90, 101 schists, Albuquerque Basin, 87, 101 Socorro Canyon-Loma Peleda fault Sandia uplift, 80, 90, 97, 115, 127 sedimentary deposits, synrift, 6 zone, 14, 158, 162, 165, 166 sandstone, 75, 77, 78, 80, 196, 229, sedimentation, 20 Socorro Constriction, 90 270 initial, 3 Socorro half graben, 135 Abo Formation, 195 seismic data, 48 Socorro Peak volcanic center, lava, Alamosa Formation, 48 seismic reflection data, 1 14 Baca graben, 46 Albuquerque basin, 125 South Canyon Tuff, 158, 161, 200, Blanco Basin Formation, 42 seismic reflection profiles, 83, 250, 202, 233, 238 Conejos Formation, 44 253 South Fork of Cuchillo Negro Creek, Inman Ranch, 233 Estancia Basin, 173 233, 234 Moenkopi Formation, 196 seismic refraction, Mogollon-Datil South Trigo Canyon, 121, 122 San Luis Valley, 28 volcanic field, 211 Southern Cordilleran basaltic andesite San Pedro Arroyo Formation, 196 seismicity, 87, 141 suite (SCORBA), 231 Sante Fe Group, 46, 113, 234 Servilleta basalts, 55 Spears Formation, 200, 203, 208 Tesuque Formation, 16 Servilleta Formation, 16 Split Rock Basin, Wyoming, 6, 8, 9 Sangre de Cristo fault zone, 12, 31, 32, Sevier Desert, 136 Split Rock Formation, 8 35, 36, 39, 40, 51, 52 Shafter transverse zone, 283 Spring Creek normal Fault, 8 depth to detachment, 37 Shatter zone, 293, 294 Stiver Canyon, 233 Sangre de Cristo Formation, 53 shale, 75, 196 strike-slip displacement, 15 , 12, 16, 19, Abo Formation, 195 Summer Coon volcano, 44, 46 31, 36, 39, 40, 61, 87, 90 San Luis Valley, 28 Sunken Block graben, 283, 290, 291, alluvial fans, 33 Shell Isleta #2 well, 12, 15, 73, 75, 293 sediment source, 48 77, 79, 114, 118 syn-rift uplift, 17 shoulder uplifts, Ladron Peak-Sierra fanglomerates, 125, 130 Santa Ana accommodation zone, 14, Lucerò area, 135 magmatism, 15 115 Sierra Cuchillo Range, 227, 229, 235, Sante Fe Group, 113, 158 Santa Ana Mesa, 131 236, 237 sedimentary deposits, 15 Santa Elena Canyon, 290 Sierra Cuchillo uplift, 234, 235, 236, Santa Fe-Coyote fault, 14, 90, 97, 238 105, 113, 114, 122, 126, 133 Sierra de Juarez, 277 T Santa Fe fault, 121, 142, 146, 152 Sierra de la Amargosa, 278 Tabletop Mountain, 234, 235, 239 Santa Fe Formation, 87 Sierra de Pilares, 289 Taos, New Mexico, 84 Santa Fe Group, 9, 11, 20, 30, 61, 75, Sierra de San Ignacio, 278 Taos Mountains, 84 79, 157, 168, 202, 227 Sierra de Santa Elena, 290 Taos Plateau, 16, 55

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Taos Plateau volcanic field, 46 , 8 volcanics Tascotal Mesa fault, 294 Tschicoma Formation, dacite, 12 San Luis Valley, 28 Taylor Creek tin district, 233 tuff of Little Mineral Creek, 229, 233 Santa Fe Group, 158, 113 tectonic framework, 84 tuff of Rocque Ramos Canyon, 229, volcanism, 54, 84 tectonic rotations, 66 231 Albuquerque Basin, 87 Tempiute transverse zone, 293 Tuff of South Crosby Peak, 200 ash-flow, 46 Terlingua block, 294 tuff of Stone House Ranch, 229 Popotosa basin, 13 Terlingua fault, 290, 291 Tularosa Basin, 241, 246, 247, 250, tholeiitic basalt, 46 Terlingua transverse zone, 283 253 Terlingua uplift, 290, 294 creation, 242 Terlingua zone, 294 Tusas Mountains, 11, 40, 54 W Tertiary, 39 Tyrone, New Mexico, 211 Wall Mountian Tuff, 19 ash flows, 11 Tyrone-Acoma gravity field, 212, 214 wells, 45, 53 extension, 101, 140, 142, 152, 164 Blanco Basin Formation, 44 late, 152, 164 Sante Fe Group, lower, 46, 48 U mid-, 8, 11 West Mesa fault, 90 pre-, 53 Uinta Mountains, 9 West Mesa section, 260, 262 plutons, 8 Uinta uplift, 8 West Mesa well, 76, 77, 78 tectonics, 53, 265 Uncompahgre-San Luis highland, 53 , 18 Tesuque Formation, 12, 16, 17, 61 Unit of Isleta #2, 114, 118. White River Formation, 18 Texas Lineament, 267, 287 See also Shell Isleta #2 well White Sands Missile Range, New Tijeras accommodation zone, 12, 14, uplift, timing, 17 Mexico, 211 15, 113, 120, 127 Upper Arkansas Basin, 6, 9 Wind River uplift, 8 Tijeras-Canoncito fault system, 59, onset of rifting, 11 Winston, New Mexico, 227, 234 140, 146 Upper Arkansas graben, 1, 84 Winston beds, 233 Tijeras fault zone, 12, 74, 90, 101, sediment source, 48 Winston graben, 2, 227, 235 127 Upper Arkansas half graben, 17 andesite, 234 Tornillo basin, 286 Urraca outcrop, 48 faults, 227, 235 Tornillo Creek, 291 Sante Fe Group, 233, 238 Tornillo Creek Fault zone, 292 structure, 235 V Tornillo Flat, 291 tectonics, 236 Tornillo graben, 283, 285, 290, 291, Valentine earthquake (1931), 267, 268 295 Valentine fauna, 17 Y trachyandesite, Cuchillo Negro Vallejo Formation, 43 volcanic complex, 231 Valles caldera system, 285 Yeso Formation, 127, 142, 143, 144, Trans-Pecos Texas, 55, 265, 267, 283 Velarde graben, 12, 61 173, 184, 196 volcanic activity, 208, 268 Vicks Peak Tuff, 14, 161, 200, 229, transfer zones, 136 233, 234, 238 Z transform structures, 136 Villa Grove accommodation zone, 14, Transocean Isleta #1 well, 76, 120 17 zeolites, Cuchillo Negro volcanic Treasure Mountain Tuff, 45 Virgin-Beaver Dam breakaway zone, complex, 231 Tres Hermanos Formation, 196 149 Zia Formation, 79, 80, 114, 118 Trigo Canyon, 121, 122 volcanic rocks, Conejos Formation, Ziana anticline, 115 Troublesome Basin, 8 44 zones of compensation, 136

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Basins of the Rio Grande Rift: Structure, Stratigraphy, and Tectonic Setting Edited by G. Randy Keller and Steven M. Cather Contents 1. Introduction

2. Tectonic Setting of the Axial Basins of the Northern and Central Rio Grande Rift 5

3. Depth and Geometry of the Northern Rio Grande Rift in the San Luis Basin, South-Central Colorado 27

4. Tertiary Stratigraphy and Tectonic Development of the Alamosa Basin (Northern San Luis Basin), Rio Grande Rift, South-Central Colorado 39

5. Variation in Paleomagnetic Rotations and Kinematics of the North-Central Rio Grande Rift, New Mexico 59

6. Cenozoic Stratigraphy, Sandstone Petrology, and Depositional History of the Albuquerque Basin, 73

7. Structure and Tectonics of the Albuquerque Basin Segment of the Rio Grande Rift 83

8. Thickness of the Syn-Rift Santa Fe Group in the Albuquerque Basin and Its Relation to Structural Style 113

9. Footwall Unloading and Rift Shoulder Uplifts in the Albuquerque Basin 125

10. Crustal Extension in the Rio Grande Rift, New Mexico 135

11. Stratigraphic Consequences of Episodic Extension in the Lemitar Mountains,

Central Rio Grande Rift 157

12. An Integrated Geophysical Study of the Estancia Basin, Central New Mexico 171

13. Structural and Tectonic Evolution of the Joyita Hills, Central New Mexico 187

14. Crustal Structure of the Western Margin of the Rio Grande Rift and Mogollon-Datil

Volcanic Field, Southeastern New Mexico and Southeastern Arizona 207

15. Winston Graben: Stratigraphy, Structure, and Tectonic Setting 227

16. Crustal Structure and Basin Geometry in South-Central New Mexico 241

17. Late Pliocene and Early Pleistocene Sedimentation as Influenced by Intrabaslnal Faulting, Southern Rio Grande Rift 257 18. Tertiary and Quaternary Tectonics of the Hueco Bolson, Trans-Pecos Texas and Chihuahua, Mexico 265

19. Basins In the Big Bend Segment of the Rio Grande Rift, Trans-Pecos Texas 283

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