718 



INDEX. 



Rocks of Green Eiver District, 646 



Rock Springs, fossils from, 215 



Roseau X Creek, 609 



Ross Fork, '328, 329 



Sage Creek, fossils from, 205 



Salt Lake, 513 



Salt Lake Basin, 513 



Salt Lake Group, 603, 634, 640 



Salt AVells,5 



Salt Works, 519, 555 



Salt River, 393, 513, 694 



Salt River conglomerate, 552, 641 



Salt River Range, 514, 518, 694 



Salt River Range, Carboniferous of, 617 



Salt River Range, geology of, 545 



Salt River Range, Jura Trias in, 622 



Salt River Valley, 405, 519, 694 



Salt River Valley, geology of, 551 



Samaria, 608 



Sand Dunes, 116, 137 



SaAvtelle's Peak, 658, 671 



Scudder, Prof. S. H., on fossil caddis flies, 

 528, 638 



Secondary triangulation,676 



Section, general, 612 



Section of Carboniferous, 618 



Section of Jura Trias, 623 



Section of Silurian, 615 



Sectiou of Tertiary, 635 



Section of Tertiarv bv Hayden, 458 



Sections of strata, 189, 331, 333, 339, 347, 

 352, 354, 358, 366, 369, 372, 377, 378, 383, 

 385, 393, 423, 426, 430, 454, 458, 462, 525, 

 526, 529, 532,33, 537, 538, 540, 541, 544, 

 545, 547, 548, 550, 553, 554, 560, 568, 570, 

 575, 577, 578, 579, 583, 584, 586, 588, 602, 

 606, 614 



Seminole Peak, 663 



Separation Peak, 655, 663 



Settlements, 56, 706 



Settlements of Green River District, 706 



Sheep Rock, 520, 598, 600 



Sheep Mountain, 27 



Shoshone Creek, 552 



Shoshone Range, 467 



Sickle Creek, 518, 546 



Silurian, 70, 101, 541, 569, 598, 600, 607, 613 



Silurian fossils, 329, 413, 417, 615 



Silurian, Lower, 329, 414 



Silurian sectiou, 615 



Silurian strata, 382 



Slate Creek, 517, 532 



Slopes of streaims, 687 



Smithfield, 603- 



Smith's Fork, 520 



Smith's Fork of Bear River, 577 



Smith's Fork of Bear River, section along, 

 579 



Smith's Fork, Post-Cretaceous of, 630 



Smoke Creek, 375 



Smoking Creek, 519, 554 



Smoking Creek, salt works on, 535 



Snake River, 324, 327, 393, 441, 512, 513 



Snake River Divide, Buffalo Fork and, 

 461 



Snake River, expedition of 1872, 424 



Snake River, Lower Valley of, 405 



Snake River Mountains, 377 



Snake River Range, 325, 391, 424 



Snake Plain, 338, 357 



Snake Valley, 381 



Snow Peak, 21, 524 



Soda Peak, 654, 667 



Soda Spring Creek, 596 



Soda Springs, 513, 519, 590 



Soda Springs, geology near, 589 



Soda Springs Hills, 596 



Soda Springs Hills, Carboniferous of, 618 



Soda Springs Valley, 596 



Soil, 92, 116 



Souls and Perkins Mine, 144 



South Fork of Blackfoot, 558 



South Hill, 666 



South Pass, 511, 524 



SpliaviKm, 589, 601, 605, 640 



Spirifer, 540, 548, 619, 620 



Spirifer (MarHnia), 598, 620 



Spiriler (Martinia) planoconvexus, 546, 610, 



619, 620 

 Spirifer Rocky montanus, 563, 584, 598, 610, 



620 

 Spirifer striatus, 546, 598, 609, 619, 620 

 Spirifirina, 563 

 Spriiig Bluff, 593 

 Spring Creek, 429, 584 

 Spring, Hooper, 593 

 Spring, Pavilion, 592 

 Spring Point, 435 

 Springs, 54 



Springs at Soda Springs, table of, 594 

 Springs, Basin Creek, 591 

 Springs, Beer, 591 

 Springs, formation, 593 

 Springs, Hill, 591 

 Springs, Iron, 592 

 Springs, Left Hand, 591 

 Springs on Cottonwood Creek, 601 

 Springs, Pyramid, 592 

 Springs, River, 592 

 Springs, Sulplnir, 595 

 Spring, Steamboat, 590 

 Stambaugh, 652 

 Star Peak Group, 625 

 Station Butte, 577 

 Saint Charles, 587 

 Steamboat Spring, 590 

 St. John, Mr., 511, 548, 553, 556, 614 

 St. John, 0. H., fossils sent by, 267 

 St. John, Orestes, report of, 321 

 Strawberry Creek, 553 

 Streams, slopes and elevations of, 681 

 Streptorynclins, 548, 619 

 Strophomena, 530 



Saint Vrains River, fossils from, 178 

 Sub-Carboniferous, 74, 76, 103, 120 

 Sublette's Creek, 576 

 Sublette Range, 514, 557 

 Sublette Range, geology of, 580 

 Sublette Range, Jura Trias of, 623 

 Sublette's Road, 517, 520 

 Sublette's Road, fossils near, 535 

 Sulphur Springs, 595 

 Surface features of T^ton District, 324 

 Swan Creek, 587 

 Swan Creek, Anticlinal near, 588 

 Sweetwater drainage, 48 

 Sweetwater Group, 110 

 Sweetwater Hills, 43 

 Sweetwater Plateau, 44 

 Sweetwater, Region soutli of, 119 



