716 



INDEX. 



Mammoth. Mine, 535 



Marnoch, G. W., fossils sent by, 268 



Marsh Creek, 513, 565, 609, 642 



Marsh Creek, geology on, 528 



Marsh Creek Group, 642 



Marsh Creek Valley, 696 



Maynard's Ranch, fossils from, 163 



McCoy's Creek, 327, 360, 388, 392 



McCoy's Creek, section 401 



McDougal's Creek, 518, 543 



McDougal's Gap, 518, 542 



Meadowville, 587 



Measurement of Rawlins base, 651 



Medicine Butte, 669 



Meek and Hayden, 386 



Meekoceras beds, 622, 624, 625, 628. 



Meekoceras gracilitatis, 558, 560; 624, 626, 627 



Meekocm'as, Mushhachanus, 560, 624, 627 



Meekoceras aplanaium, 558, 624, 626 



Menibranipora, 632 



Mendon, 604 



Meridian Ridge, 513, 517, 531, 536 



Meridional Valley, 528 



Meridional Valley, geology of, 539 



Mesozoic, 453, 457, 470 



Mesozoic orography, 632 



Mesozoic rocks, 621 



Cretaceous, 621 



Mesozoic strata, 336, 361, 425 



Metamorphics, 66, 98, 119 



Methods of topographical survey, 675, 679 



Middle Creek, 557 



Middle Park, drift of, 202 



Middle Park, "lake beds," 202 



Mill Creek, 609 



Minerals, catalogue of, 157 



Minerals of Green River District, 645 



Miner's Delight mine, 145 



Mines, Sweetwater, 142 



Mink Creek, 521, 600, 602 



Mioplosus abbreviatus, 535, 639 



Modiola, 537, 575 



Montpelier, 520, 587, 588 



Moody Creek, 411 



Morainal Ridges, 444 



Moraines in Wind River Mountains, 



524, 526 

 Morrison, Colorado, fossils from, 197 

 Mosquito Creek, 361 

 Mountain ranges of T6ton District, 325 

 Mountains, elevations of, 681 

 Mountains of Green River District, 514 

 Mountains, tables of, 681 

 Mount Bainbridge, 360, 393, 402 

 Mount Baird, 432 

 Mount Caribou, 360, 391, 395-399 

 Mount Caribou volcanics, 403 

 Mount Darby, 529 

 Mount Essex, 133 

 Mount Hayden, 411, 474 

 Mount Kimball, 583 

 Mount Leidy, 325, 457, 459, 460 

 Mount Leidy Group, 448 

 Mount Leidy Highlands, 444, 456 

 Mount Pisgah, 360 

 Mount Preuss, 514, 590, 654, 667 

 Mount Putnam, 323, 328, 477, 519, 567, 569, 



668. 

 Mount Washburn, 672 

 Mount Moran, 413,419,475 



Mount Sheridan, 659, 671. 



Mount Steele, 663 



Mount Wagner, 549 



Mudge, B. F., fossils sent by, 268 



Mud Springs, 129 



MurcMsonia, 548, 619 



Mushbach, J. E., 509, 546, 554, 587, 588, 610 



Myacites, 575, 577, 626, 627 



Myalina, 537, 626, 627 



Myalina wMtei, 575, 626 



Mytilus, 537, 626 



Myrica, 535, 638, 639 



Neritina, 540, 575, 626, 627, 632 



Neritina incompta, 308 



Neritina paielliformis, 309 



Neritina patelliformis var, weberensis, 309 



Neritina pisum, 308 



New Fork of Green River, 516 



New Fork of Green River, geology on, 526 



New Fork Peak, 670 



Newton, 603 



Niagara limestone, 415, 416, 449, 456, 469 



Niobrara Group, 112 



Northern branches of Blackfoot, 559 



North Hill, 666 



North Logan Peak, 654, 669 



OholeUa, 568, 616 



Obsidian, 378 



Ogden, 521 



Ogden Peak, 669 



Ogden Quartzite, 598 



Ophileta, 515 



Oregon trail, 25 



Organic contents of Carboniferous, 619 



Organic contents of Green River Group, 637 



Organic contents of Jura Trias, 624 



Organic contents of Post-Cretaceous, 631 



Organic contents of Silurian, 615 



Organic contents of Wahsatch Group, 637 



Orography, Paleozoic, 620 



Orography, Post-Cretaceous and Meso- 

 zoic, 632 



Orography, Tertiary, 640 



Ostrea, 575, 577, 582, 626, 632 



Ostrea bellapUcata, 276 



Ostrea quadripUcata, 275 



Ostrea sannionis, 277 



Ostrea soleniscus, 536, 538, 629 



Ostrea strigilecula, 537, 558, 579, 583, 586, 

 626, 627 



Ostrya, 535, 638, 639 



Orthis electra, 615 



Orihis Mppolite, 615 



Ortliis plicatella, 599, 616 



Orthis testudinata, 599, 616 



Ovid, 587 



Owen, F.D.,509 



Oxford, 603 



Oyster Ridge, 517 



Oyster Ridge geology, 533 



Fachymya aastinensis, 298 



Pachymya herseyi, 298 



Pacific Creek, 464 



Packsaddle Creek, 429 



Palaeozoic areas of T^ton District, 477 



Palaeozoic formations, 413, 420, 445, 446, 

 465 



PalsBOzoic formations, general section of, 

 480 



Palaeozoic orography, 620 



