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Home , Centennial Mountains, Lake Mountains, Little Hatchet Mountains, Medicine Butte, Pass Peak Formation, Sierras Pampeanas

Index [Italic page numbers indicate major references]

Absaroka fault, 423 arkose, 276, 519 389, 391 Absaroka sheet, 336, 337, 345, 349, Armstead anticline, 217, 229, 235 Beartooth Mountains, 469 355, 425 structural development models, 222 Beartooth thrust sheet, 470 Absaroka thrust, 79, 137, 335, 346, Armstead Hills, 86 Beaverhead basin, 500, 503, 505, 347, 349, 408, 414, 417, 422, Armstead thrust, 220, 229, 230, 233, 506 424, 425, 436 235 Beaverhead conglomerate, 229, 230, Absaroka thrust fault, 335, 336 Ashbough Canyon, 208, 209 235, 284, 309, 316, 508 Absaroka thrust sheet, 18, 94, 334, ashflow, rhyolitie, 309 Beaverhead County, 268 335, 337, 341, 345, 422, 425 Astoria Springs, 338 Beaverhead Divide fault zone, 258 Absaroka thrust system, 88, 89, 354, Atwell Guleh Member, 480 Beaverhead Formation, 219, 220, 355, 359, 421, 424, 432, 434, 272, 276 438 Baculites yokyamai, 423 Beaverhead Group, 205, 212, 213, Absaroka volcanic field, 480 Badge Pass fault, 173, 179 231, 235, 253, 268, 269, 271, Adaville Formation, 422 Badwater Fault zone, 483 272, 273, 275, 285, 287, 309, Agua Hedionda ranges, 153, 158 Bannack, , 229, 233 310 Alberta foothills, 156, 159, 383 Bannack Pass, 237, 250, 253, 258 rocks, 311, 316 Alberta syncline, 156 Bannack thrust zone, 238 sandstone units, 231, 232, 233, Alberta triangle zone, 156, 161 Basal Conglomerate Member, 500 234, 235, 287 Creek, 272 basalt, 279, 309 , 86, 237, 239, Alkali Creek, 293 basement, 99, 100, 111, 115,116, 263, 293, 303 Allen Valley Shale Member, 415 120, 121, 343, 363, 383, 397, central, 243, 258 alluvial fan system, 545, 552 403, 405, 359 southern, 238, 240, 243 , 246, alluvium, 212, 458 Archean, 121 251, 252, 254, 258 Alps, 169 block comers, 105 Beaverhead Mountains pluton, 342, American Cordillera, 143 block, 105, 107, 121, 138, 70, 246, 253, 254 American Fork area, 413 71, 333, 336 Beaverhead River Valley. 188, 196, Amoco No. 1 Snowline Grazing dry complex, foreland, 11 203 hole, 270 corner, 105, 113, 117 Beaverhead sequence, 276 amphibolite, 230 crystalline, 57, 73, 120, 137, 143, bedding length, 54, 60, 62 Amsden Formation, 9, 196, 278, 146, 150, 151, 155, 157, 158, beds 323, 357 159, 432, 434, 443, 454, 475 coal, 420 Amsden Group, 310 deformation, 53, 54, 60 gypsum, 134 Ancestral , 36 deformed, 48, 56 limestone, 184, 211 Andan orogenic belt, 145 fault, 53, 104, 112, 115, 116, micrite, 562 Andean Cordillera, 143, 144, 145, 117, 354 red, 211, 320, 324, 326, 333, 156 geometry, 48, 50, 53, 56 336, 349, 420, 521, 559, 567 Andean segment, 144 length, 54, 62 sandstone, 231, 324 Mountains, 143 mechanical, 13 sedimentary, 336 andesite, 454 mesoscopic structures, 123 belt angiosperms, 542, 562 microscopic structures, 123 Central Precordillera thrust, 146 anhydrite, 451 ramp anticlines, 72 --Wyoming thrust, 119, , 458 rock, 45, 49, 76, 113, 361 120, 121, 130, 347, 357, 364 Antelope Island, 412 shortening, 402 Idaho-Wyoming thrust, 129, 137, anticlines strain, 126 155, 156, 240, 243, 247, 253, foreland, 86 thrusting, 466 333, 354, 516, 519, 520 ramp, 68, 73 models, 482 Idaho-Wyoming, 238 Antone Peak, 272, 278 Basin and Range province, 36, 557 thrust, 109, 362 Anvil Points Member, 480 Basin-Range extension, 309 thrust fault, 111 aplite, 243 basins Belt arch complex, 504 Appalachians, 111 foreland, 542,552 Belt basin, 82, 172, 177, 181, 196, Aquilapollenites senonicus Interval hydrographic, 480 320 zone, 272 intraforeland, 490, 498, 505 Belt Supergroup, 172, 177, 178, 179, Arapien Shale, 420 Battle Mountain, 376, 388 180, 196, 205, 258, 504 arc, magmatic, 36 Battle Mountain normal fault, 376 eastern slab, 165 Archean, 240 Battle Ridge monocline, 172, 178, kinematic model, 169 Archean craton, 412, 413, 425, 427 182 rocks, 217, 257, 262 Arco Hills formation, 254 Battleship reverse slip zone, 121 western slab, 169 , 143, 155, 156 BDT. See brittle-ductile transition Belt uplift, 505 west-central, 145 BDZ. See brittle deformation zone Bermejo basin, 151, 157, 158 argillites, 504 Beall Canyon thrust, 183 Bermejo Valley, 149, 150, 157 Arizona, 448, 449, 458 Bear Creek fold and fault system, 454 betonites, 561 southeastern, 34, 462 Bear Peak area, 454 Big Belt Mountains, 498 southern, 34 Bear thrust, 336, 376, 380, 387, Big Cottonwood Formation, 412, 434

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Big Cottonwood Group, 335 507 Canadian shield, 12 , 451, 462 Boulder-Highland uplift, 498, 500, Canyon Range sheet, 425 Big Hole River, 194, 196 503, 505 carbonates, 44, 60, 100, 101, 151, Big Piney, 397 Bozeman, Montana, 177, 217, 504 159, 191, 192, 220, 221, 238, Big Snowy Formation, 323 breccia, oxidized, 205 246, 247, 251, 268, 270, 341, Big Snowy Group, 310 Bridger arch, 178, 179, 180, 182 357, 454, 478, 504, 535, 540, , 18, 157, 469, 471 Bridger basin, 475 550, 551, 552, 564 Bighorn Dolomite, 43, 48, 49, 57, , 477 marine, 451 60 Bridger Range, 91, 177, 178, 179, Care fault, 177 Bighorn monocline, 470 181 Carmichael anticline, 187 , 5, 8, 14, 16, 17, foreland structure, 88 Carmichael syncline, 183, 185 403, 470, 471 British Columbia, 35, 168 Casper arch, 8, 15, 397, 471, 474, central 471 britde deformation zone, 121, 123, 482 Bighorn thrust, 471 124, 126, 127, 137 Casper arch thrust, 22, 15 Biltmore anticline, 194, 198, 204 brittle-ductile transition, 160 , 16 Biltmore fault, 188, 196 Brockman Hills, 458 Casper Mountain fault, 15, 17 Biltmore foreland anticline, 188, 194 Brooks Creek anticline, 182, 183 cataclasis, 41, 42, 50, 70, 134, 137, Biltmore Hot Springs, 190 Brushy Basin Shale Member, 561 138, 278 biosparite, 184 Buckhom Conglomerate, 542, 543, Cedar Creek syncline, 221, 226 biotite, 518, 519 554, 559, 561 Cedar Hills, 566, 567 bioturbation, 503, 505, 548 Bull Creek anticline, 380, 388 Cedar Mountain, 420, 458 Birch Creek Valley, 253 Bull Creek blind thrust, 388 modal analyses, 564 Bisbee basin, 462 Bull Creek fault, 377, 388 Cedar Mountain Formation, 417, 533, Bisbee Group, 462 Bull Creek normal fault, 388 542, 543, 552, 557,559, 561, Bismark fault, 176, 180, 183 Bull Creek thrust, 376, 377, 380, 562, 564, 567, 568 Bitterroot lobe, 169 381, 387, 388, 391 Cedar Mountain strata, 553 bivalves, 542, 550 Bull Creek thrust plate, 377, 388 Cedar Mountain strike belt, 567 Black Forest massif, 88 Burro Canyon Formation, 542 Cenozoic, 94, 150, 151, 205, , 471 Burro uplift, 454 557 Black Hills monocline, 471 buttressing, 88 late, 36, 146 Blackleaf Formation, 205, 271, 490, middle, 36 491, 498, 503, 504 , 506, 507, Cabin block, 262 Cental Montana-Crazy Mountains 508 Cabin Creek, 338 trough, 498 lithostratigraphic intervals, 504, Cabin plate, 247, 250, 253, 257 Centennial basin, 293 505,506, 507 Cabin sheet, 303 Centennial fault, 269 Blacktail Deer Creek, 205, 213, 293 Cabin thrust, 230, 238, 239, 250, Centennial Mountains, 269, 270 Blacktail fault, 176, 198, 203, 208, 258, 268 Centennial Valley, 269, 270 213 Cabin thrust fault, 243, 250, 253 Central Appalachian salient, 337 Blacktail Mountains, 179, 203, 204, model, 251 Central Montana embayment, 498 205, 208, 213, 214 Cabin thrust plate, 240, 247, 252, Central Precordillera, 146, 153, 155, northeast flank, 208 253, 257, 263 158, 159, 160, 161 Blacktail Mountains salient, 91, 179, Cabin thrust sheet, 254, 281 Central Precordillera thrust belt, 146, 196, 198, 203 Cache Creek blind fault, 380,383, 151 Blacktail normal fault, 214 387, 389, 390 chalcedony, 567 Blacktail reverse fault, 86 Cache Creek fault system, 380, 381, Chalk Creek drainage, 422 Blacktail syncline, 204, 208, 209, 383, 387, 389, 390, 291 Challis Volcanics, 251, 254 214 Cache Creek foreland thrust, 89 Chamberlain Creek, 243 Blacktail-Snowcrest foreland uplift, Cache Creek subfault, 380, 381, 386, Chappo Member, 424, 519, 520, 291 389, 390, 391 521 Blacktail-Snowcrest Laramide uplift, Cache Creek thrust, 335, 336, 343, Charleston allochthon, 432 271, 279 345, 390, 391, 516 Charleston thrust fault, 425 Blacktail-Snowcrest uplift, 79, 91, calcareous nodules, 561 Charleston thrust plate, 420 203, 204, 205, 214, 268, 273, calcite, 126, 127, 134, 285, 310, Charleston thrust sheet, 412, 417, 274, 281, 283, 285, 287, 291, 335, 349, 549, 564 428 309, 498, 500, 505, 507 veins, 129, 134, 185, 342 Charleston thrust system, 89, 420, gravity models, 294, 303 California, 36 432 gravity survey, 292 California uplift, 36 charophytes, 420 kocomant 1[\ 11 1 (\1 111 i f„..i, 1 en i i rcn W1UVO0, l/UOWJILWIlk, t XJ, I X, IV t , l^il, v.ai^ti lauii, ui UCLH1S, JJU 138, 172, 333, 336 , 402 chert, 231, 247, 475, 518, 519, 535, crystalline basement, 151, 224 Camp Creek, 188, 191, 192 540, 543, 564, 568 Bloody Dick creek, 257, 258, 262 Camp Creek fault, 180, 191 Chevron Game Hill Unit well, 376, Blue Dome block, 254 Camp Creek thrust, 172, 177, 178, 380, 383 Bluebird Mountain Formation, 247, 182 Chevron, Inc. No. 1-34 Game Hill 250, 253, 254 Camp Creek thrust fault, 180 Unit well, 376, 380, 383 Bootlegger Member, 507 Camp Davis Formation, 336, 389 Chevron, Inc. Federal No. 1-33 Cabin Boquillas Formation, 454 Canadian Cordilleran thrust belt, Creek Unit well, 376 Boulder batholith, 89, 92, 302, 498, 156 Chica de Zonda, 153, 160 503 Canadian Foothills province, 240 Chicken Creek, 562, 567 Boulder River Sandstone Member, Canadian Rocky Mountains, 88, 252 Chihuahua, northern, 458

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Chihuahuan fold and thrust zone, 4SI, Conover fault, 210, 211, 212 Deep Creek fault, 16 454 Conover Ranch Formation, 205, 210, Deep Creek normal fault, 7 Chile, central, 143 211, 212, 310 Deerlodge basin, 500, 503, 505 Chile trench, 145 Consortium on Continental deformation Chiricahua Mountains, 458 Reflection Profiling, 3, 78 compartmental, 8 chlorite alteration, 123 Continental Divide, 243, 247, 251, Laramide, 27, 30, 35, 121 Chocolate Mountains thrust, 36 258 sinistral, 442 Chriss Canyon wells, 567 continental margin, 413, 415 Wyoming foreland models, 3, 9 Chriss Creek, 566 Continental normal fault, 516 Dell, Montana, 220, 286 Chugwater Formation, 373, 376, 377, corals, 210 Dell sequence, 275 381, 388 Cordillera, western, 111, 112 deposits Circle Cliff Structure, 478 Cordilleran belt, 552 alluvial, 205 Cities Service test well, 153, 158 Cordilleran foreland, 465,482, 483, evaporite, 476 Clark Canyon, 232 484 marine, 477 Clark Canyon Reservoir, 221, 252, Cordilleran Foreland Basin, 490,494, meanderbelt, All 269 498, 503, 506, 508 nonmarine, 520 Clarks Fork area, 15 structural partitioning, 508 river, 522 Clarks Fork basin, 469, 471, 505, Cordilleran goesyncline, 84 syntectonic, 271, 272 506, 507 Cordilleran hingiine, 84, 91 development, foreland-basement, 494 Clarks Fork Canyon, 14 Cordilleran miogeocline, 94 Diablo Platform, 454 Clarks Fork fault, 470 Cordilleran orogenic belt, 143, 447, diamictites, 258 Clarks Fork sag, 500 451, 490 diapirism, 420 Clarks Fork sheet, 471 Cordilleran orogeny, 450, 462 salt, 559 Clause Creek, 380 Cordilleran thrust and fold belt, 165 Dillon Granite Gneiss, 240, 247 Clause Peak, 338, 342, 380 Cordilleran thrust belt, 18, 76, 84, dinosaur remains, 420 clay, 71, 504, 551, 564 88, 94, 172, 203, 214, 217, Din woody Formation, 205, 213, 240, smectite, 535 229, 237, 259, 268, 271, 273, 252, 254, 258, 269, 335 spacer, 68, 70, 73 281, 287, 291, 305, 395 , 399, dips, 70 claystone, 473, 474, 480, 503 466, 477, 480, 482, 483 fault, 55, 62 Clear Creek thrust, 15, 17, 243 Corral Creek fault, 15, 17 discontinuity, ancient crustal, 412, Cliff Creek, 391 Cottonwood arch, 432, 434, 439 425 Cliff Creek thrust, 89, 376, 380, Cottonwood fold, 436, 438 Disturbed Belt, 176 383, 386, 387, 388, 389 Cottonwood uplift, 412, 413, 414, Divide Creek basin, 293 northern, 387 417, 421,425 Divide Creek fault, 247, 250, 251, Cliff Creek thrust plate, 380, 388, Crandall Canyon, 422 253, 254, 258 391 Crandall Canyon thrust, 432, 436, Divide Creek thrust, 243 Clover Creek, 278 438 Divide Creek thrust sheet, 359 Coad Mountain, 14 craton, Archean, 412, 413, 425, 427 Divide fault, 258 coal, 471, 473, 516, 520, 521 Crawford sheet, 130, 131, 136 Divide quartzite conglomerate unit, Coalville, 415, 416, 422 Crawford thrust sheet, 94, 130, 137, 253 coaly sequence, 520 417 Dixel and Chevron, USA No. 1 Chriss Coast ranges, 36 strain, 135 Canyon wells, 567 Coconino Sandstone, 66 Crawford thrust system, 130, 132, dolomicrite, 479 COCORP. See Consortium on 335, 360, 417 dolomite, 205, 243, 310, 455, 475, Continental Reflection Profiling Crazy Mountain basin, 182 564 Collignoniceras woollgari, 415 , 94, 121, 220, 271, 283, dolostones, 278, 476 Colorado, 7, 27, 36, 432, 482 316, 354, 557 Douglas Creek arch, 480 northwestern, 465, 479, 483 Cross Range fault, 181, 182 Douglas Creek Member, 480 western, 432, 542 Croyden, 416 Dragoon Mountains, 451, 460 Colorado Front Range, 7, 22 crustal shortening, 19,27, 34, 434, Draney Limestone, 503 , 27, 39, 31, 448, 482 Draney-Smoot-Smiths Formation, 542 450, 483, 557 Current Creek Formation, 420, 421, Drummond, 167, 498 rotation, 31, 36 422, 432, 478 Dry Canyon fault, 423 Colorado Plateau plate, 34 Cypridea sp., 420 Dry Fork Ridge fault, 44 Colorado Plateau Province, 557 Duchesne River, 420 Colorado Plateau subplate, 439 Dakota Sandstone, 542, 554 Duchesne River Formation, 422 Colorado region, 482 Darby fault, 524 Complexiopollis patulus, 561 Darby sheet, 338, 349 EA thrust, 15, 78 compression, horizontal, 482, 483 Darby thrust fault, 334 Early Cretaceous, 34, 535, 559 conglomerate, 229, 238, 247, 251, Darby thrust sheet, 334, 337, 341, earthquakes, crustal, 146, 149, 153, 252, 262, 271, 273, 274, 286, 400 158, 160 309, 310, 415, 416, 420, 422, Darby thrust system, 88, 89, 137, East Canyon area, upper, 425 424, 425, 432, 462, 471, 473, 336, 345, 346, 349, 376, 397, East Canyon Creek area, upper, 415 474, 475, 498, 504, 506, 516, 395, 398, 400, 405, 406, 408 East Canyon Creek-Croyden belt, 521, 532, 534, 535, 544, 545, Darby-Hogsback-Prospect thrust 417 559, 562, 564, 567, 568 system, 405 East Canyon Reservoir, 416 cobble, 415, 416 Deadline Ridge fault, 403 East Gunnison front, 563 red, 372, 389, 391 Deadman normal fault zone, 251 East tear fault, 15 conglomerate sheet, 547, 549, 551 debris, glacial, 376 East Muddy Creek fault, 220

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East Portrillo Mountains, 451, 454, 360, 373, 376, 380, 387, 388 Fourmile Creek, 567 455 thrust, 101, 119, 146, 151, 179, Franklin Mountains, 60, 458 Eastern Precordillera, 146, 148, 151, 182, 203, 208, 209, 214, 217, Fritz Creek, 250 153, 155, 156, 158, 161 220, 235, 238, 243 , 252, 268, Fritz Creek plate, 247, 254 , 262 Echo Canyon conglomerate, 130, 310, 373, 420, 451, 454, 462 Fritz Creek sheet, 364 416, 417, 422 transverse, 451, 494 Fritz Creek thrust, 253, 262 Eighteenmile Creek, 243 wrench, 5, 32 Fritz Creek thrust fault, 243, 253 El Paso, Texas, 447, 454, 458 Federal Pacific Creek borehole, 522 Fritz Creek thrust plate, 243, 254, El Paso-Las Vegas transect, 448, feldspar, 18, 41, 124, 540, 564 263 449, 450, 451, 462 potassium, 518 Fritz Creek thrust sheet, 359 Elk Mountains, 5 , 14 Front Range structural province, 240, Elk Mountains volcanics, 177, 187, Fillmore arch, 86 253 323, 508 First Sandstone Member, 500, 503 Frontal Cordillera, 145 Elkhorn basin, 500, 503 Five Springs area, 5, 14 Frontier Formation, 271, 272, 383, Elkhom plate, 320 Five Springs thrust, 5, 15, 17 415, 421, 422, 423, 490, 498, Ellis Group, 494, 498, 509 Flagstaff beds, 559 506, 509 Ellis-Morrison sedimentation, 497 Flagstaff Limestone, 478 lower, 498, 509 Emigration Canyon syncline, 436, Flaming Gorge area, 432 444 Flathead Sandstone Formation, 220, Gallatin basin, 500 , 19, 94, 121, 155, 391, 398, 279 , 41, 180 475 Flatstaff Member, Green River Game Creek thrust, 336, 376, 377, early, 251, 391, 444, 471, 474, Formation, 420 380, 381, 387, 388, 391 478 flood fan systems, 552 Game Hill fault, 89, 336, 376, 516 middle, 155, 213 Florence Pass fault, 16 Game Hill reverse fault, 320 Ephraim conglomerate, 336 , 454 Game Hill thrust, 376, 381, 383, Ephram fault, 86 folds 386, 387, 389, 390 Ericson Sandstone, 422, 424 back-limb, 10 Game Hill thrust plane, 381 Ermont thrust, 229, 230, 233, 234, basement-cored, 108 Game Hill thrust plate, 386 235 buckle, 127, 135 Game Hill Unit well, 376, 380, 383 erosion, 36, 203, 220, 221, 246, cross-crestal, 11 Gannet Group, 426, 497, 542 274, 278, 359, 390, 432, 454, drape, 3, 22, 66 Garfield Mountain, 281 458, 462, 482, 504, 506, 507, fault-cored, 73 Garnet stock, 166 520, 541, 554 forced, 102 garnet, 518 Euler pole, 31 foreland-style, 72 gastroliths, 561, 567 Evanston, Wyoming, 424 macroscopic, 209, 214 gastropods, 550 Evanston Formation, 416, 417, 421 mesoscopic, 209 Georgetown Canyon area, 132, 135 evaporite deposits, 420 rabbit-ear, 11 Georgetown thrust, 89 evolution, structural, 364 thrust-sheet, 104 glacial debris, 376 Exxon No. 1 Myers Federal dry hole, train, 134 Glance conglomerate, 462 270 foliation, 6 Glance facies, 462 Foothills provinces, 253 glauconite, 540 fanglomerate, 480 For Union Formation, 18, 518, 520 Glory Mountain, 342 Fanny Peak lineament, 471 forebulge, 508 Goat Mountain area, 258 Farallón plate, 20, 21, 35, 36, 483, foreland basin, 542,552 Golden Spike Formation, 166, 508 498 geometry, 100 Goose Lake anticline, 474 Farmington Canyon Complex, 417 model, 552 Grand Hogback, 479, 480 basement, 360 Foreland province, 43 Grand Valley normal fault, 336 Farmington ramp, 417 fault geometry, 44, 50 granite, 243, 516 faults rocks, 42 Granite anticline, 386 anastomosing, 43 theoretical models, 44 Granite Creek, 342, 385, 386 basement, 15, 53, 104, 112, 115, Foreland structures, 43 Granite Creek blind thrust, 381, 383 116, 117, 158, 172, 354, 364 Fort Union Formation, 180, 422, Granite Creek thrust plate, 376, 382, block, 219 424, 432, 469, 471, 473, 474, 386, 387 compartmental, defined, 8 475 Granite Creek thrust system, 336, cross, 211 Fort Union rocks, 18 376, 381, 383, 386, 387, 389, curvature, 60 Fort Union Tullock Sandstone, 471 390 detachment, 210, 211 Granite Mountains, 473, 482 j * — Cf m Uip, JJ, U¿ deformed, 134 Granite Ridge 1-9-2D well, 9 identification method, 54, 62 fragments, 134 Granite syncline, 389, 391 master, 54, 62 Four Eyes Canyon plate, 259, 286, granitic stocks, 180 normal, 83, 112, 116, 172, 173, 309 Grasshopper Creek, 230, 235 176, 180, 181, 203, 219, 226, Four Eyes Canyon sheet, 270, 274, Grasshopper plate, 258, 322 240, 268, 360, 391, 451 276, 281, 316 Grasshopper thrust, 262 reverse, 18, 53, 86, 111,116, Four Eyes Canyon thrust, 251, 262, Grasshopper thrust plate, 179, 257 120, 150, 151, 172, 198, 220, 268, 269, 275, 286, 309 Gravelly Range, 500, 506 222, 283, 292, 403, 305, 462, Four Eyes Canyon thrust plate, 254, gravels, 220, 221, 500, 506, 507, 563 259, 262, 263 549 tear, 212, 214, 220, 221, 240, Four Eyes Canyon thrust sheet, 198, Grayling syncline. 221, 230, 233, 247, 250, 252, 263, 336, 349, 259, 268, 274, 286 234

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graywacke, 494 Highlands fault zone, 196 137, 155, 156, 240, 253, 333, , 34 Hilliard Shale, 422 516, 519, 520 Great Blue Limestone, 413 hingeline, Paleozoic-early Mesozoic, lithic units, 354 Great Falls, 498 159 northern, 355 Great Plains, 32 Hoadley thrust fault, 165 illite, 136, 504, 564 Great Salt Lake, 412 Hoback area, 520, 523, 528 crystallinities, 136, 138 Green River, 383 subsidence curves, 522 imbricates, 336 Green River basin, 18, 121, 482 Hoback basin, 89, 367, 373, 376, imbrication, thrust, 336, 337, 350, northern, 515,520, 521, 522, 381, 383, 518, 519 466, 482 523, 527 depositional events, 390,391 Immigrant Trail anticline, 15 , 420, 432, tectonic events, 389,390,391 , 474 475, 476, 477, 479, 480 Hoback Canyon, 336, 349, 350 Indianola, 563, 564, 566 Green River Lakes area, 126 Hoback fault, 336 Indianola conglomerate, 566 Greenhorn lineament, 268 Hoback Formation, 372, 376, 381, Indianola Group, 420, 532, 533, 534, Greenhorn Range, 271 387, 389, 390, 519, 520, 521, 540, 541, 559, 562, 566, 568 Grenville crust, 30 523 new unit, 562, 566 Greybull, Wyoming, 18 Hoback normal fault, 336 inoceramids, 415, 423 Grissly Hill area, 258 Hoback Peak, 338 lnoceramus altersdorfensis, 423 , 566, 568 Hoback Range, 336 Interior Seaway, 469 Gros Ventre foreland uplift, 367, 376, Hoback River, 376, 380, 381, 383 intrasparite, 564 380, 389, 391 Hoback strata, 383, 385, 386, 388, iron, 549 Gros Ventre Formation, 43 390 iron formation, 12 Gros Ventre Group, 335 Hogsback decollément, 434, 439 thrust, 360 Gros Ventre highlands, 519 Hogsback thrust, 18, 89, 347, 398, iron oxides, 124 , 78, 156, 336, 402, 405, 406, 408, 424, 425, stained, 279 342, 349, 372, 389, 408, 516, 428, 434 ironstone concretions, 564 520 Hogsback thrust sheet, 434, 442 Irving Creek, 251 ancestral, 320 Hogsback thrust system, 432, 434, Italian Canyon, 247 Gros Ventre uplift, 516, 520 436, 438 Italian-Austrian thrust plate, 169 Gulf well, 6 Holston Mountain thrust system, Gunnison Formation, 562 360, 362 Jàchal, 153 Gunnison Plateau, 534, 535, 540, Home Canyon anticline, 131 Jackson Hole, 336 541, 542, 557, 559, 561, 562, Hop Creek Ridge, 567 Jackson thrust, 89, 385 566, 567, 568 Horn anticline, 8 Jackson thrust sheet, 89 eastern, 563 Horn area, 16 Jackson-Prospect thrust system, 89 southeastern, 561 Horn fault, 17 Jake Canyon, 205 western, 566 hornblende, 519 Jake Canyon fault, 204, 205, 208, Gunnison Reservoir, 559, 561, 566 Horse Prairie Creek, 218, 219, 258 213, 214 Gypsum Springs Member, 252 Horse Prairie Creek basin, 293 Jarillal Formation, 153, 154, 155 gypsum, 134, 451 Horse Prairie fault, 173 jasperoid, 205 Horse Prairie fault zone, 239, 252 Jeep Trail fault, 212 Hall-Petch relationship, 124 Hoyt Canyon fault, 413 Jefferson Canyon, 172, 177, 187 Hamilton Dome fault, 44 Huachipampa Formation, 151 Jefferson Canyon fault, 181 Hams Fork Member, 416, 417, 421, Huaco, 155 Jefferson Canyon segment, 181 422, 423, 424 Huaco Valley, 146, 159 Jefferson Canyon thrust, 172, 176, Hans Peterson Flats, 220, 222 Hudson, Wyoming, 18 177, 180, 181, 187 Hansel allochthon, 497 Hunt Mountain anticline, 14 Jefferson Formation, 205, 221, 243, Harebell Formation, 383, 471, 520 Hunter Canyon Formation, 480 247, 251, 254 Hawley Creek, 254 Huntsville, 360 joint sets, 337 Hawley Creek plate, 243, 262 Judd Shale member, 415 Hawley Creek thrust fault, 243, 253 Idaho, 18, 20, 34, 119, 176, 237, Jura Mountains, 88 Hawley Creek thrust plate, 243, 253, 251, 254, 262, 330, 336, 491, , 283, 559 254, 262, 263 498, 510, 542 Hawley Creek thrust, 258, 262 central, 494 Keetley volcanics, 425, 432 Hawley Mountain overthrust, 238 east-central, 263 Kelmbeck Canyon, 307, 310, 311, Helena embayment, 83, 320 eastern, 199, 497 316 Helena salient, 91, 94, 172, 176, southeastern, 258, 426, 494 Kelmbeck Canyon-South Limekiln 196, 198, 319 southern, 497 Canyon divide, 312 kinematic models, 322 western, 508 Kelmbeck thrust, 312, 315,316 rotations, 330 Idaho batholith, 35, 36, 92, 169, Kelvin Formation, 414 Hell Canyon pluton, 180 257, 320, 498 Kemmerer, Wyoming, 425 hematite, 567 Idaho-Utah-Wyoming thrust belt, Kentucky, eastern, 112 Henefer Formation, 416, 422 119, 120, 121, 130, 347, 354, Kerr Creek, 377 Henneberry Ridge, 218 357, 364 Kerr Creek anticline, 388 models, 222 Idaho-Wyoming belt, 238 Kibbey Sandstone, 205, 279, 310 Highland Mountains, 176, 177, 178, Idaho-Wyoming overthrust belt, 335 Kidd Quartzite conglomerate, 232 179, 180, 182, 188, 190 Idaho-Wyoming salient, 155, 519 Kidd thrust system, 287 foreland uplift, 187, 192 Idaho-Wyoming segment, 143 Kingsbury conglomerate, 471 Highland uplift, 498 Idaho-Wyoming thrust belt, 129, Kinnikinic Quartz, 243, 246, 247,

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254 Lemhi River Valley, 254 Lost Cabin Member, 474 Kootenai Formation, 187, 196, 205, Leodore, Idaho, 254 Lost River overthrust, 238 271, 323, 490, 491, 498, 500, leucosyenite, 243 , 254 508, 542 Lewis and Clark line, 320, 323 Lost Trail Pass, 257 paleomagnetic studies, 324 Lewis and Clark uplift, 498, 505 Love Ranch Formation, 454, 462 strain, 327 Lewis Sea, 469 Lower Calcareous Member, 503 Kootenai-Blackleaf contact, 504 Lewis thrust fault, 165 Lower Cretaceous, 534, 542 lignite, 273, 470, 480 Lower Wells, 357 La Barge, Wyoming, 408 Lima anticline, 268, 270 Luman Tongue Member, 475 La Barge Creek, 408 Lima conglomerate, 232, 253, 268, Lysite Member, 474 La Barge Meadows, 355, 363 269, 271, 272, 276, 278, 279, La Barge Member, 521 280, 285, 286, 508 macrofossils, 550, 559 La Barge Platform, 156, 395,398, Lima Peaks, 259, 268, 270, 273, macroscopic folds, 209, 214 403,408 281, 282, 287, 506 Madigan Gulch anticline, 220, 221, model, 399 southwestern, 271, 287 222, 226, 230, 234, 235 rotation, 403 Lima region, 176, 198, 213, 229, Madison Group, 187, 205, 270, 276, subsidence curves, 522 232, 247, 268, 269, 271, 273, 336, 341, 342 La Barge shear zone, 402, 403, 405, 283, 285 Madison Limestone, 9, 43, 381 406, 408 Limekiln thrust, 311 Madison Range, 42, 180 La Barge thrust, 157 limestone, 127, 134, 146, 153, 158, Madison-Gravelly uplift, 498, 500, La Barge-Big Piney area, 518, 521 187, 205, 230, 235, 243, 240, 503, 505 La Prelle anticline, 14 247, 250, 252, 268, 274, 276, magnetite, 518 LaHood Formation, 172, 177, 178, 281, 286, 310, 316, 455, 462, Mahogany bed, 479, 480 180, 181 471, 475, 480, 500, 516, 520, Maiden Peak area, 257, 259 Lake Basin zone, 483 532, 534, 567, 568 Manning Canyon detachment, 497 Lake Flagstaff, 478 bed, 184, 211 Mantua Sandstone, 470 Lake Gosiute, 476, 477, 480 cherty, 247 marble, 12, 230, 240, 278, 279 , 425 dolomitic, 566 Matagusanos Valley, 146, 158, 160 Lake Uinta, 478, 479, 480 gastropod, 503 Maudlow basin, 500, 503 lakes, playa, 551, 552 lacustrine, 504 Mayflower Mine fault, 181 Lakota Formation, 542 micritic, 198, 550 Mayflower Mine thrust, 172, 177, Lambdotherium, 474 limy nodules, 568 180, 181, 183 Lance Formation, 18, 469, 473, 518, litharenites, 518, 519, 520 Mayflower Mine-Cave-Jefferson 520 lithic fragments, 518, 519 Canyon thrust system, 180, Laney Shale Member, 477, 480 Little Belt Mountains, 498 181, 182 Laramide, defined, 2 Little Cliff Creek, 376, 381 McCarthy Mountain salient, Laramide basement thrusting, 482 Little Granite anticline, 385, 390 rorations, 327 models, 466,482 Little Granite Creek thrust, 377, 380, McCartney Creek, 191, 192 Laramide basins, 31 388 McCartney fault, 190, 196 Laramide belt, 27 Little Granite Creek thrust plate, 388 McCartney Mountain area, 179 Laramide compression, 21 Little Hatchet Mountains, 458 McCartney Mountain salient, 88, Laramide crustal shortening, 27, 309, Litde Muddy Creek, 424 172, 176, 177, 178, 180, 187, 316 Little Pond Mountain thrust, 361 190, 196 Laramide deformation, 27, 30, 35, Little Salt Creek, 534, 535, 567 McCartney reverse fault, 86 121 Litde Sheep Creek area, 273, 281 McGowan Creek Formation, 246, Laramide foreland province, 143, 160 Little Sheep Creek conglomerate unit, 247, 251 Laramide foreland thrust sheet, 121 273, 274, 275, 276, 286, 288 McKenzie Canyon Limestone, 309 Laramide orogeny, 8, 16, 18, 20, 22, Little Water Canyon, 283, 287 McKenzie thrust system, 268, 270, 203, 204, 205, 219, 498, 509 Little Water syncline, 259, 262, 263, 276, 309, 310 plate collision, 20 268, 274, 283, 287 McKnight Canyon, 232, 268, 271, Laramide reverse faults, 86 model, 285 276, 283, 286, 287, 307, 310, Laramide uplifts, 1, 31 Little Series, 434 312, 313 Laramie Range, 12, 15, 22 Livingston area 504, 507 McKnight Canyon limestone unit, northern, 12, 15, 16 Livingston Group, 508 276 northwestern, 15 Lodgepole Limestone, 183, 184, 187, McKnight Canyon sequence, 276 Las Salinas anticline, 153 192, 205, 233, 259, 276, 279, McKnight models, 315 Las Salinas Ax-1, 153 280, 281 McKnight thrust, 310,312,315, 316 Las Vegas, , 447 cleavage, 184, Ì87, 192 Meade thrust, 408, 426 Late Cretaceous, 19, 30, 34, 155, Lombard Limestone, 209, 210, 212, Meade thrust fault, 335 173, 179, 199. 232, 235, 240, 276, 279, 310, 312, 315, 316 Meade thrust sheet, 94, 130 252, 285, 444, 477 Lombard thrust, 320 Meadow Creek, 293 Late Mississippian, 252 London Hills anticline, 182, 183, Meagher Formation, 183, 278 leaves, angiosperm, 549, 561 187 Medicine Bow Range, 5, 397 Lebo Member, 470, 471 London Hills fault, 187 Medicine Butte fault, 424 Leesburg, 254 London Hills foreland anticline, 187 Medicine Butte thrust, 424 Lemhi Group, 243, 254, 257, 258, London Mountain, 187 Medicine Lodge Creek, 247, 259 263, 273 London Mountain thrust, 187 Medicine Lodge Creek basin, 250, Lemhi overthrust, 238 London Mountain thrust system, 187 251 , 254, 258, 263, 293 thrust, 380 Medicine Lodge fault, 238

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Medicine Lodge overthrust fault, 238 kinematic, Belt Supergroup, 169 444 Medicine Lodge plate, 251, 253, 259, Helena salient, 322 Mount Rutherford, 377, 380 286, 490 La Barge Platform, 399 Mount Rutherford compartmental Medicine Lodge sheet, 274, 364 Laramide basement thrusts, 466, fault, 388, 391 Medicine Lodge thrust fault, 243, 253 482 Mountain City Window, 360 Medicine Lodge thrust plate, 251, Little Water sycline, 285 Mowry Shale, 432 263 modification, thrust sheet Moxa arch, 18, 86, 94, 156, 157, Medicine Lodge thrust sheet, 268, geometry, 89 161, 363, 383, 395, 397, 402, 286, 359 Moxa thrust, 397 403, 406, 408 Medicine Lodge thrust system, 238, reverse fault, 112 Moxa thrust, model, 397 239, 240, 251, 253, 258, 268 rock, 65, 66 Moxa uplift, 79 Medicine Lodge Valley, 253, 262 sedimentary-tectonic, 482 Muddy Creek, 259 Meeteetse Formation, 469 strain, 441 Muddy Creek basin, 262, 268, 293, Meeteetse thrust, 469 structural development, 222 316 Melrose, Montana, 177 syntectonic sedimentation, 466 Muddy Sandstone, 542 Mesaverde Formation, 18, 420, 421, theoretical, anisotropic materials, mudflow, 166 469 44 mudrocks, 271, 273 Mesaverde Group, 477, 479 deformation, 17 mudstone, 205, 211, 243, 475, 470, Mesochara, 420 displacements, 44 471, 478, 504, 534, 540, 544, mesoscopic deformation, 221, 287 stress distributions, 44 547, 550, 552, 559, 561, 564, mesoscopic fabrics, 165 Timber Butte-McKnight thrust, 566, 567 mesoscopic folds, 209 315 red, 269, 534 mesoscopic structures, 123, 434, Uinta arch, 439, 444 Muensteria sp., 549 127, 131, 435, 436, 437 uplift, 3, 5, 17 Mullen Creek-Nash Fork shear zone, Mesozoic, 94, 119, 131, 151, 165, Wyoming foreland deformation, 3, 12, 16, 17 205, 240, 277, 372, 382, 557 9, 17 Mural Limestone, 462 metaconglomerates, 12 Moffit Basin, Utah, 434 musco vite, 518, 519 metamorphism, 205 Molina Member, 480 mylonite zone, 169 metasedimentary rocks, 12, 250 mollusks, 561 mylonites, Santa Rosa, 36 metavolcanic rocks, 12 Moncrief Gravel, 471 Mexican border, 447 Monida high, 270 Navajo Sandstone, 532, 535 Mexico, 34 Montana, 14, 27, 30, 34, 35, 42, 79, Nazca plate, 145, 160 mica, 70, 72, 124 88, 93, 111, 237, 320, 330, Nebo thrust, 420 micrites, limestone, 198, 550 405, 490, 491, 507, 542 Neil Creek-Crandall Canyon area, micritic fragments, 550 central, 83, 88, 120 422 micritic units, 184 eastern, 498 Neil Creek-Perdue Creek area, 424 microcline, 519 northern, 168 Nephi, 567 microfossils, 542, 559 northwestern, 176, 508 Nevada, 34, 84, 494, 498 microfracturing, 14 southern, 5 east-central, 498 microscopic structures, 123, 127, 131 southwestern, 35, 86, 88, 91, 94, New Fork Lakes, 383 Middle Bull Creek thrust plate, 377 113, 171, 179, 203, 213, 218, New Fork Member, 523 Middle Canyon Formation, 243, 247, 229, 263, 268, 281, 291, 307, New Fork reverse slip zone, 121 251, 309, 310, 316 319, 324, 490,494, 510, 521 New Fork Tongue, 522 Mike Harris Creek, 336 west-central 165, 176 , 34, 36, 120, 449, 451, Mill Creek area, 412 western, 199, 217, 494, 508, 509 454 Miner Lake fault zone, 258 Montana Cordillera, west-central, 165 northern, 27 minerals Montana craton, 263 southern, 34, 448, 458 evaporite, 480 southwestern, 240, 251 southwestern, 462 micaceous, 518 Montana disturbed belt, 167 New York, 337 Mission Canyon Limestone, 183, Montana foreland, 91, 204 Nicholia Creek, 247, 253 192, 205, 259, 309, 310 Montana reentrant, southwestern, Nicholia Creek basin, 247, 250, 293 Missoula Group, 258 172, 217 Nicholia thrust, 243 Missoula, Montana, 165 Montana salient, 91, 94, 217 Nicholia thrust plate, 253 models Montana thrust belt, 83, 89, 357 Niland Tongue Member, 475 basement, 112 Montana transverse zone, 84, 86 No. 1 USA Amoco A-E borehole, 522 Cabin thrust fault, 251 southwest, 172, 176, 177, 178, nodules, calcareous, 561 Cedar Mountain, 564 196, 198, 199 North American Cordillera, 199, 156, deformation, comer problem, 9 montmorillonite, 564 159, 160, 490 dextral transpression, 443, 444 Monument structure, 478 North American craton, 27, 94 dextral wrench strain, 444 Morrison, 567 North American foreland, 160 Farallon subduction-Laramide Morrison beds, 559, 561 North American overlap zone, 156 orogeny, 483 Morrison Formation, 187, 205, 269, North American plate, 20, 21, 35, flexural, northern Green River 323, 414, 494, 498, 509, 532, 36, 448, 483, 498 basin, 523 534, 559 North Coal Canyon, 564 foreland basin, 552 Morrison strata, 533, 534 North Dakota, 27 foreland structures, ramp positions, mottles, white, 549 North Flank fault zone, 421, 422, 81 Mount Nebo, 566 423, 424, 425 gravity, Blacktail-Snowcrest uplift, Mount Raymond thrust, 417, 432 North Flank thrust, 89, 432, 434 294, 303 Mount Raymond thrust fault, 436, North Flank thrust fault, 432

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North Fork, Webber Creek, 247 Paris-Willard thrusting, 498 Preuss Formation, 130, 131, 414 North Horn beds, 559 Park City Formation, 258, 269 Preuss salt beds, 130 North Horn Formation, 420 Grandeur Member, 252 Price Canyon, 205, 420 North Maple Canyon, 562, 563 Parkman Formation, 9 Price River Formation, 420 North Owl Creek area, 15 Parley's Canyon syncline, 436, 438, Principal Cordillera, 145 North Owl Creek fault, 15 444 Prospect fault, 524 North Rainey Creek, 336 Pass fault, 172, 177, 178, 179, 181 Prospect sheet, 336, 350 North Uinta thrust 475, 476, 477, Pass Peak conglomerate, 389 Prospect thrust, 79, 88, 89, 137, 483 Pass Peak deposition, 521 336, 345, 346, 349, 376, 381, Northern Bull Creek sycline, 389 Pass Peak Formation, 519, 521 385, 386, 389, 390, 391, 395, Northern Cordillera, 151 Pavant thrusts, 535, 554 397, 399, 400, 405 Nugget Formation, 376, 377, 380, Pavant-Canyon thrust system, 86 ancestral, 405, 406, 408 388, 399, 400, 402, 403 Peet Creek well, 293 late, 406 Nye Bowler zone, 483 pelmicrite, 310 Prospect thrust fault, 335 Pelona schist, 36 Prospect thrust sheet, 320, 334, 336, Ogden, 360 Peloncillo Mountains, 458 337, 342, 349 Ogden thrust, 360 Peninsular batholith, 36 Protelliptio, 542 Ohio Creek Member, 480 Pennsylvania, northern, 337 Proterozoic, 172, 198, 240, 247, oil shale, 475, 476, 479, 480 Pentacrinus ossicles, 134 254, 258, 413 Oman, 169 Peoa, Utah, 414 early, 412 oncolities, 561, 564, 568 Perry line, 172, 173, 176, 196, 320 late, 412 ooids, 134, 550 Perry line fault zone, 176 middle, 412 Ophir Formation, 535 Peterson Limestone, 503 province, overlap, 91, 94 Oquirrh basin, 413, 427 petrofabrics, 339 Pryor Mountains, 5 Oquiirh Group, 413 Phillips No. Sunland Park Unit, 454 Purcell anticlinorium, 168, 169 , 425 Phosphoria Formation, 205, 252, Oquirrh uplifts, 36 254, 258, 269, 281, 355, 494, Quadrant Sandstone, 205, 210, 212, Oregon Buttes area, 516 519 220, 222, 252, 268, 269, 278, Orocopia schist, 36 phyllosilicates, 42 281, 282, 309, 310, 311, 315, Orocopia thrust, 36 Piceance Creek basin, 479 316 orogenic belt, defined, 448 Pie de Palo, 149, 150, 157 Quarternary, 150 Osborn reverse slip zone, 121 Pigeon Creek Canyon, 534, 535, 541 quartz, 41, 91, 124, 166, 231, 247, ostracodes, 420 Pigeon Creek Formation, 531,532, 279, 518, 519, 564 Ouachita paleomargin, 36 534, 540, 542, 544,550, 554, quartzite, 12, 232, 240, 243, 247, Overthrust Belt, 111 563 273, 275, 278, 286, 412, 417, overthrusts, 431 assemblages, 544 475, 535, 540, 552 , 5, 16, 18, Pigeon Creek Member, 567 quartzose, 503, 504 471, 482 Pigeon Creek strata, 540, 541, 552 Quealy Dome, 17 southern, 20 Pigeon Creek system, 550 western, 15 Pigeon Creek-Cedar Mountain Racetrack Creek area, 420 Owl Creek uplift, 8, 15 synthem, 553 Railroad Canyon area, 254 Oyster Ridge Sandstone Member, Pinedale anticline area, 518, 523 Railroad Canyon Formation, 247, 415, 422 subsidence curves, 522 250, 251 Piney Creek block, 8, 15 ramps Pacific Creek anticline, 397 Piney Creek fault, 5, 6 lateral, 240, 253, 357, 373, 387, Pacific plate, 36 Piney Creek thrust, 6, 8 388 Pakistan, 111 Pioneer batholith, 322, 327 subsurface, 226 Paleocene, 469,471,473,475,478 rotations, 327 thrust, 81, 102, 180, 226, 254, early, 199, 389, 390 plagioclase, 518, 519 354, 359, 363, 383 late, 390, 391 plates, thrust, 104, 165, 238, 240, formation, 102 Paleogene, early, 30, 34 243 thrust fault, 112 paleomagnetic data, 37 See also specific thrust plates transverse, 108 paleosols, 503 Pocatello, Idaho, 360 Rand schist, 36 Paleozoic, 119, 130, 150, 151, 165, Poison Creek, 243 Rattlesnake Mountain, 57 203, 235, 240, 258, 259, 269, Poison Creek thrust, 243 Rattlesnake Mountain anticline, 277, 301, 309, 316, 372, 382, Pole Canyon anticline, 182, 183, Wyoming, 2, 6, 8, 14, 22, 56 412 185, 187 Rattlesnake Mountain structure, 44, late, 36 Foie Canyon thrust, i85, 18/ 49 lower, 354 Pole Canyon thrust sheet, 184, 185 Red Butte, 275 upper, 36, 220, 354 Porcupine Creek anticline, 14 Red Butte conglomerate unit, 276 palynomorphs, 276, 416, 420, 422, Porcupine Creek area, 14 Red Butte unit, 276 423, 424, 541, 542, 561, 567 Porcupine fault, 14 Red Cabin Monocline, 516 Parachute Creek Member, 480 porphyroblasts, 166 Red Creek outcrop, 349 Parant Mountains, 88 Power River basin, 471 syncline, 131 Paris sheet, 364 Precambrian, 19, 20, 41, 48, 165, Red Rock basin, 316 Paris thrust, 426 220, 230, 235 Red Rock extension fault, 259 Paris thrust fault, 335 Precordillera, 159 Red Rock fault, 220, 276, 283 Paris thrust sheet, 94 northern, 151 Red Rock River Valley, 281, Paris-Willard-Putnam allochthon, 360 Precordillera thrust belt, 143, 144 293

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Red Rock Valley graben, 269 Sage Creek anticline, 48, 56, 62 Sevier orogenic belt, 30, 34, 363, Rees Flat, 567 Sage Creek basin, 277, 279, 280, 411,413,422, 427, 428, 532, Rhodes Valley, 432 295 542, 552, 554 rhyolite, 213 Sage Creek normal fault, 268, 277, Sevier orogeny, 22, 523, 563 Rich Model anticline, 224, 226 279, 281 plate collision, 20 Richard's Mountain fanglomerate, 475 Sage Creek structure, 49 Sevier overthrust belt, 532 Richeau dome, 14 Sage Junction Formation, 417 Sevier thrust belt, 143, 156, 160, Rierdon Formation, 494 Salina area, 534 359, 364 Rio Grande, 451 Salina Canyon, 535, 559 Sevier thrust system, 86 Rio Grande rift, 36 Salina-Gunnison Plateau, 534 Shady Valley thrust sheet, 361 Rio Grande Valley, 458 Salmon River arch, 262 shales, 60, 62, 100, 211, 250, 253, Rio Jàchal Formation, 151, 155 Salmon River suture zone, 498, 503, 355, 372, 373, 423, 451, 455, Rochester anticline, 188, 190, 196, 508, 510 462, 470, 473, 475, 480, 504, 198 Salt Canyon area, 132 505, 520, 521, 532, 543 Rochester foreland anticline, 191 cleavage, 132, 134 oil, 475, 476, 479, 480 Rock Mountains, southern, 22 folding, 134 red, 211 Rock Springs uplift, 518, 520 Salt Creek, 567 Wolsey, 183, 200 Rockport Lake, 432, 434 , 415 shale sequence, 520 rocks Salt Lake Valley, 425 shear model, 441 basement, 12, 45, 49, 76, 86, 91, Salt Range, 111 Sheep Creek, 208,209, 211, 272 92, 113, 121, 149, 180, 190, Saltlick reverse slip zone, 121 Sheep Creek decollement, 132 257, 258, 262, 361, 373, 412, , 454 Sheep Creek syncline, 212 428 southern, 454 Sheep Creek thrust, 131, 132, 134 carbonate, 342, 462 San Andrews fault system, 20 Sheep Mountain anticline, 157 crystalline, 43, 78, 86, 91, 94, San Juan Limestone, 146, 153, 154, Sheep Ridge anticline, 14 121, 169, 181, 188, 230, 238, 158, 159 Sheephead anticline, 14 257, 262, 268, 320, 335, 336, San Pitch Mountains, 557 Sheeprock Mountains, 425 412, 460, 520 San Rafael structure, 478 Shell well, 293 basement, 57, 73, 188, 230, 238, San Rafael Swell, 477, 559, 566 Shepard thrust plane, 388 247, 250, 253, 257, 258, 262 sandstone, 72, 220, 243, 247, 250, Shepherd thrust, 336 exotic, 498 253, 257, 271, 273, 276, 357, Sheridan, Wyoming, 471 granite, 43 373, 420, 422, 423, 424, 425, SHFZ. See Southern Highlands fault marine, 240 470, 471, 473, 475, 478, 480, zone metamorphic, 203, 204, 205, 277 500, 503, 504, 516, 518, 520, Shire Member, 480 metasedimentary, 12, 250, 516 521, 522, 528, 532, 534, 540, Shirley Mountains tear fault, 15, 17 sedimentary, 43, 44, 76, 78, 94, 543, 544, 547, 550, 562, 564, Shoal Creek fault, 381 119, 121, 129, 146, 173, 176, 566, 567, 568 shortening, 127, 129, 130, 131, 177, 179, 180, 188, 205, 218, marine, 415 134, 137, 139, 155, 165, 184, 240, 293, 323, 334, 338, 427, nonmarine, 205 194, 196, 199, 208, 210, 213, 506 white, 518, 519, 520 309, 316, 340, 343, 350, 357, sedimentary cover, 73, 335 sandstone quartz, 205 383, 390, 399, 408, 437, 444 siliciclastic, 500 Sandy Hollow thrust system, 194, shortening volcanic, 177, 180, 183, 205, 196 basement, 402 229, 230, 231, 232, 235, 454, Sandy Marshall Creek, 380, 391 bulk, 431 458, 504 Sanpete Formation, 533, 542, 562, compressional, 450 Rocky Mountain basement, 156 567 crustal, 19, 27, 34, 434, 482 Rocky Mountain foreland, 1, 41,53, Sanpete Valley area, 420, 532, 542, horizontal, 403, 516 65, 71, 76, 92, 94, 105,119, 559 Laramide, 308, 316 155, 156, 160, 165, 172, 176, Santaquin, 412 plastic, 129 177, 196, 217, 229, 268, 272, Sapphire thrust plate, 320, 330, 490 sedimentary cover, 127, 129, 130 279, 291, 320, 395, 397, 465, Sappington Member, 243 Sierra Alta, 451 466, 516, 552 Saturday Mountain Formation, 254 Sierra Chica de Zonda, 148, 150, Rocky Mountain foreland structure, Sawatch structure, 478 151, 159 defined, 291 Sawtooth Formation, 494 Sierra de Huaco, 144, 151, 153, 158, Rocky Mountains, 27, 30, 143, 203 Scott Canyon, 246 159, 160 central, 466 Scott Peak Formation, 243, 247, Sierra de Maz, 150, 151, 156 northern, 319 251, 254 Sierra de Vallé Fértil, 149, 150 Rogers Pass, 165 Second Sandstone Member, 500, 503 Sierra de Vallé Fértil block uplift, Rome trough, 112 sedimentation 157 rotations, 70, 129, 327, 330, 386, marine carbonate, 490 Sierra de Vallé Fértil system, 150 432 nonmarine, 490 Sierra de Villicum, 151 Colorado Plateau, 31 shallow-marine, 490 Sierra Juarez, 451, 454, 458 crustal block, 405 syntectonic, 466 Sierra Madre Range, 5 La Barge Platform, 403 volcaniclastic, 480 Sierra Nevada, 36 McCarthy Mountain salient, 327 Seductisporites sp., 561 Sierra Nevada batholith, 36 Pioneer batholith, 327 seismicity, crustal, 146, 149 Sierra Pié de Palo, 153 thrust sheet, 319, 337, 346, 349 Semail ophiolite thrust sheet, 169 Sierra Rica Mountains, 458 Ruby Range, 188, 196, 203, 204, Seven Devils arc, 498 Sierra Santa Rita, 451 247 Sevier golf thrust belt, 353 Sierras Pampeanas basement-uplift

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provinces, 144 South Owl Creek Mountains, 474 Taylor thrust area, 360 Sierras Pampeans ranges, 149, 155, South Owl Creek thrust, 470, 471 Tendoy fault, 229, 273 159 South Rochester fault, 188, 191, 196 Tendoy Group, 270, 309, 312 silt, 504, 564 South Uinta thrust, 479, 483 Tendoy plate, 259, 276 siltite, 273, 286 Southeast Gunnison Plateau, 561 Tendoy Range, 86, 180, 218, 220, siltstone, 205, 243, 253, 271, 273, Southern Bighorn thrust, 471 240, 270, 307, 357 276, 310, 416, 420, 423, 462, Southern Highlands fault zone central, 308 474, 480, 503, 516, 521, 548, (SHFZ), 190, 192 northern, 309, 310 550, 564, 566 Spanish Fork Canyon, 420 Tendoy sheet, 198, 268, 270 Siphonophyllia sp., 210 Spanish Peaks-Gardiner fault zone, Tendoy thrust, 91, 219, 220, 229, Six Mile Canyon, 542, 559 176 230, 251, 252, 253, 262, 268, Skolithos sp., 549 Sphinx conglomerate, 180, 508 272, 281, 282, 283, 285, 300, Skyline Trail conglomerate, 336, 372 Spring Canyon anticline, 436, 444 309, 310 slaty cleavage, 166 Stellatochara mundula, 420 Tendoy thrust fault, 253 slicken fibers, 166 Sterling, Utah, 559 Tendoy thrust plate, 240, 243, 252, slickenlines, 126, 129 Stone Mountain thrust, 360 259, 262, 263 slickensides, 212, 214 strain Tendoy thrust sheet, 268, 269, 271, Small Horn Canyon, 205, 212 axes, 437, 440 274, 275, 276, 281, 283, 286, Small Horn Canyon anticline, 212 basement, 126 287, 309 , 341 Crawfrod thrust sheet, 135 Tennessee, northeastern, 360 eastern, 359 dextral wrench, 443 Tennessee sandstone, 67 Snake River Canyon, 337 field, 431, 439, 440, 461 Tensleep fault, 12, 15, 16, 20 Snake River downwarp, 268 models, 441 Tensleep fault zone, 16 Snake River fault, 354, 357, 364 plastic, 134 Tensleep Formation, 357 Snake River fault zone, 364 sedimentary rocks, 129 Tertiary, 34, 372 Snake River Plain, 176, 236, 254, twinning, 341 early, 173, 179 257, 258, 263, 293, 336, 354, stratigraphy, mechanical, 101 Teton basement uplift, 353 358, 364 Strawberry Reservoir, 420 Teton block, 359 Snake River Plain volcanics, 319, stress Teton fault, 336 331 concentration, 112, 116 Teton Pass, 336, 342, 345, 346, 353 , 354, 355, 359 fields, 44, 360, 363 , 12, 89, 336, 342 Snake River volcanic plain, 269 magnitudes, 112 ancestral, 320, 330 Snaky Canyon Formation, 247, 254, trajectories, 349 Teton uplift, 359 258, 494 striations, 214 Teton Valley, 336 Snider basin, 397, 398, 403, 405, Strobitochara sp., 420 Teton-Gros Ventre block, 345 408 structures Teton-Gros Ventre Range, 338 north, 405, 406 mesoscopic, 123, 127, 131, 434, Teton-Gros Ventre uplift, 79, 88, 89 south, 400 435, 436, 437 Tex Creek thrust, 243, 253 Snowcrest foreland thrust system, 78, microscopic, 123, 127, 131 Texas, 454 88, 91, 180, 198 thrust belt characteristics, 77 southwesternern, 451 Snowcrest Range, 78, 180, 198, 205, Stump Sandstone, 414 western, 36 247, 268, 269, 271, 277, 278, stylolites, 127, 134, 194 Texas lineament, 458 506 sub-Prospect thrust, 403, 406 Thaynes detachment, 397, 398, 403 Snowcrest Range Group, 252, 269, sub-Snowcrest Range thrust, 262, Thaynes Formation, 220, 269, 285, 279, 281, 309, 310 263, 279, 297 309, 397 Snowcrest Range thrust system, 262, subduction, 35, 36 thickening, crustal, 483 279 Sublette anticline, 131 Thistle, 532 Snowcrest terrane, 278, 279, 287, subsidence curves, 522 Thompson fault, 403 303 subsurface geometry, 155, 156 Thousand Peaks well, 434 Snowcrest thrust system, 268, 278, Summit Creek-Dry Creek basin, 293 Three Forks Formation, 205, 243, 309 Summit Valley syncline, 187 247, 251 Snowcrest trough, 176, 283 Sun River basin, 500, 507 thrust belts, 109, 362 Snowcrest-Greenhorn fault system, Sunshine nose, 14 Central Precordillera, 146 299, 300 Superior Province, 12 geometry, 362 Snowcrest-Greenhorn thrust system, Surrett Canyon Formation, 247, 251, Idaho-Utah-Wyoming, 119, 120, 176, 203, 268, 279 254 121, 130, 347, 354, 357, 364 Soap Gulch, 188, 191 Swauger Formation, 243. 258 Idaho-Wyoming, 119, 129, 137, Soda Lakes area, Colorado, 7 Sweetgrass arch, 504, 507, 508 155, 156, 333, 516, 519, 520 Sohare Formation, 372, 376, 382, Sweetgrass-Milk River uplift, 505 thrust faults, 101, 119, 146, 151, 383, 389 Sweetwater County, Wyoming, 424 172, 179, 182, 203, 208, 209, Sohare strata, 390 Sweetwater-Granite Mountain uplift, 214, 217, 220, 235, 238, 240, Soldier Fork, 559 5 243, 252, 268, 310, 373 South America, 159 Swift Formation, 494 thrust plates, 104, 165, 238, 240, South American overlap zone, 156 syenite, 243 243 South American plate, 145 thrust ramps, 81, 102, 180, 226, South Boulder River Valley, 187 Targhee-Teton uplift, 18 254, 354, 359, 363 South Creek Formation, 247, 251, Targhee thrust system, 88 thrust sheets, 153, 217, 254, 349, 254 Targhee uplift, 89 360 South Dakota, 27 Taylor thrust, 360 geometry, 353

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rotations, 319,346, 349 425, 428, 478 Chevron Game Hill Unit, 376, thrust system, defined, 376 Uncompahgre structure, 478 380, 383 thrusting, 466, 467, 468, 471, 482, Uncompahgre uplift, 36 Chriss Canyon, 567 483, 484 Unicoi Formation, 360 Federal Pacific Creek, 522 thrusts -Mexican border, 447 Granite Creek-Federal, 380 back, 451 uplift Granite Ridge 1-9-2D, 9 basement, 465, 482 block, 104 Gulf, 6 foreland basement, 480 fold-thrust, 22 No. 1 USA Amoco A-E, 522 imbricate, 151, 169, 229 foreland, 104 No. 29-1 Peet Creek-Federal, 293 Laramide basement, 466 intraforeland, 490, 497, 498, 500, Shell Oil No. 34X-13 Unit, 293 tillite, 412 505, 508, 510 Wagon Wheel No. 1, 520, 522 Timber Butte, 310 models, 3, 5, 17 Wells Canyon, 357 models, 315 postthrust foreland, 89 Wells Formation, 357 Timber Butte thrust, 310,312,316 postthrusting, 108 West Gunnison front, 566 Timiriasevia sp., 420 Upper Cretaceous Member, 503, 505 West Lima Peak, 281 Tintic Quartzite, 412, 535 Upper Mississippian, 252 West Traverse Range, 425 Tip-Top thrust, 403, 408 Upper Wells, 357 Western anticline, 131 Tipton Shale Member, 476 Upper-Fined Grained Member, 504 Western Interior, 30 Tobacco Root batholith, 180 Upton Sandstone Member, 415 Western Precordillera, 146 Tobacco Root Mountains, 172, 176, Utah, 18, 20, 84, 86, 119, 357, 360, Whisky Flat area, 132, 134 177, 179, 180,182, 196, 198, 432, 531, 535, 553, 557 cleavage, 134 204 central, 86, 532, 534, 541, 554, White River Mountains northern, 177, 180 557 basement structures, 123 Tobacco Root thrust, 181, 183, 185, east-central, 477, 542 sedimentary cover, 127 187 eastern, 542 strain, 126,129 Tobacco Root-Pole Canyon thrust north-central, 414, 431, 432 White River thrust, 480 system, 187 northeastern, 465, 477, 478, 483 White River uplift, 480 Tobacco Root-Ruby thrust sytem, 88 northern, 27, 34, 79, 258, 412, White Rock thrust, 42, 121, 126 Tobacco Root-Ruby uplift, 498, 500, 497, 503 Member, 476 503, 505 west-central, 542 Willard thrust, 137, 360, 421, 426 Tongue River lineament, 12, 17 western, 494 Willard thrust sheet, 139, 425 Tongue River Member, 471 Utah highland, northern, 425 Williams No. 1-30, Granite Creek- Tongue River zone, 16 Federal well, 380 trends, inherited, defined, 16 Victorio Mountains, 458 Willow Creek, 243 trends, primary, defined, 15 Vincent thrust, 36 Willow Creek fault, 172, 177, 181 , 252 volcanic rocks, 146, 177, 180, 183, Willow Creek thrust, 243, 253 Tulum Valley, 150 205, 229, 230, 231, 232, 235, , 471 Tununk Shale, 542 454, 458, 504 Wilmot Gulch thrust, 243 Turner Valley Field, 369 volcaniclastic sediments, 480, 566 Wind River, ancestral, 475 Twin Creek beds, 134 volcanics, 139, 221, 247, 251 , 18, 471, 480, 482 Twin Creek Formation, 131, 132, volcanism, 161, 400 Wind River bloc, 520, 523, 528 134, 252, 341, 374, 376, 377, Wind River Canyon, 5, 16, 20 380, 388, 431, 435, 444 Wagon Wheel No. 1 borehole, 518, Wind River fault, 524 cleavage, 435, 438 520, 522 Wind River Formation, 15, 474 Twist Gulch Formation, 533, 534, Wales, Utah, 561, 562 Wind River front, 336 540, 559, 562, 564, 567, 568 Waltman field, 15 Wind River highlands, 520, 522 Twist Gulch strata, 542 Waltman Lake, 473 , 5, 13, 14, 15, 16, Waltman Member, 473, 474 18, 42, 48, 78, 120, 121, 129, Uinta arch, 88, 421, 431, 434, 436, Wanship, Utah, 417 136, 137, 155, 165, 336, 397, 442 Wasatch fault, 425 402, 408, 474, 482, 516, 519, evolution hypotheses, 438 , 422, 423, 424, 523, 528 model, 439, 444 425, 432, 475, 476, 480, 518, southern, 524 western, 435 519, 520, 521 Wind River thrust, 22, 42, 121, 126, Uinta axis, 89, 425 , 434 139, 383, 475, 516 , 420, 421, 422, 432, Wasatch Mountains, 360, 412, 420, Wind River thrust sheet, 42 477, 478, 480, 482 425, 427, 432 hanging wall, 42, 48, 49 Uinta flank thrust, 91 central, 432, 444 Wind River uplift, 12, 20, 79, 176, Uinta foreland thrust, 78 western, 436, 438 516, 520, 523 Uinta Mountain Group, 412, 434 Wasatch normal fault zone, 432, 436 Wolsey Shale, 183, 220 , 156, 412, 413, Wasatch Plateau, 420, 532, 567, 568 Wood River Formation, 494 414,417,420, 425, 428, 432, Wasatch strata, 383 Woodhurst Limestone, 276 434, 439, 444, 475, 478, 479, Washakie Range, 42, 79, 469, 471 Woodside Formation, 252, 269 482, 483 Washakie thrust system, 49 Wrangellia-Seven Devils Uinta North Flank fault, 347 Washington, northern, 35 superterrane, 497, 498 Uinta North Flank thrust, 89 water, 480, 506, 547, 551 Wyoming, 1, 6, 27, 35, 48, 78, 79, Uinta region, 412 Wayan Formation, 427, 542 93, 111, 119, 165, 330, 353, Uinta trend, 411 Webber Creek, 247 363, 367, 465, 469, 482, 483, Uinta trough, 88 Weber River, 417, 422 484, 490, 491, 542 Uinta uplift, 89, 412, 421, 422, 424, wells central-western, 333

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northern, 5, 199, 498 defined, 1 Wyoming thrust belt, 383 southeastern, 12 deformation models, 3 western, 99, 108 southern, 36 geometry, 13 southwestern, 86, 395, 417, 422, petrology, 12 Yellowjacket Formation, 240, 257, 432 Wyoming Province, 12, 60 262, 263 western, 18, 20, 88, 121, 367, Wyoming salient, 76, 88, 94, 497, 503, 507, 515 319 zircon, 518, 561 Wyoming foreland, 1, 490 joints, 337 zone basement complex, 11, 13 rotation, 330 foreland, 461 crustal shortening, 19 Wyoming shelf, 270 triangle, 369, 381, 383, 390, 420

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