VIII LIST OF ILLUSTRATIONS. 



Facing page— 



Plate XXXVII. Sections along the axis and west flank of T6ton Ranges 422 



XXXVIII. Profiles and section across Pierre's Mountains, stations 42,v 40. 426 



XXXIX. Views, Gros Ventre Range 448 



XL. Sections, Gros Ventre Range, stations 44, 46 „. 450 



XLI. Sections, Gros Ventre Range, station 46 456 



XLII. Sections, Buffalo Fork and Ml. Leidy Highlands, sta. 48, 46. 462 



XLIII. Section, Buffalo Fork and Mount Leidy Highlands, station 48. 468 



XLIV. Sections, Buffalo Fork Mountains, station 49 470 



XLV. View, eruptive rocks, Willow Creek Basin 474 



XL VI. Views, North Fork of Pierre's River 476 



Accompanying A. C. Peale's Report. 



XL VII. View in the Green River Basin, looking towards Granger.. .. 516 



XL VIII. View, northwest side Wind R. M.S., from Green River Basin. 524 



XLLX. Sections from Wyoming Range, east to Green River Basin 526 



L. Map, west side Green River Basin, northern portion 528 



LI. Map, west side Green River Basin, southern portion 530 



LII. Diagram section of Fault and Fold, east side of Oyster Ridge. 532 



LIII. Sections across the Green River Basin 540 



LIV. Sections across the Wyoming Range 542 



LV. Sections across valley of John Day's River 544 



LVI. Section north of station 53 546 



LVII. Diagram of structure of the Salt River Range 548 



LVIII. Sections showing structure of Salt River Range 550 



LLX. Sections in the Salt River Range 552 



LX. Section along Crow Creek to east side of Salt River Range.. 554 



LXI. Section through station A. Position of Meekoceras ap lanatum. 558 



LXII. Sections in the Blackfoot Basin 560 



' LXIII. Sections, station 70, and Blackfoot' River north of station 70. 562 



LXIV. Map of the Blackfoot Basin 564 



LXV. Map and sections in the Portneuf region 566 



LXVI. Lithographic view, Basult in Lower Portneuf Basin 568 



LXVIa. Basalt in Portneuf Valley, looking south 570 



LXVII. Section along Twin Creek, east from Bear River 574 



LXVIII. Sections across Smith's Fork of Bear River 578 



LXLX. Section from Thomas' Fork through station 41 to South Fork. 582 



LXX. Sections on Bear Lake Plateau 584 



LXXI. Section from Bear River eastward to Thomas' Fork 586 



LXXII. Map of Bear Lake on portion of Bear River region 588 



LXXIII. Map of Soda Springs on Bear River in Idaho 590 



LXXIV. Lithographic view, Formation Spring at Soda Springs 592 



LXXV. Diagram of terraces east of Logan and on Franklin Butte . . . 604 



LXXVa. Franklin Butte and north end of Cache Valley 606 



LXXVI. Synclinal of Pliocene beds on Weston Creek 608 



MAPS. 



[Plates L, LI, LXIV, LXV, LXXII, LXXIII are also maps.] » 



Accompanying A. D. Wilson's Report. 



A.. Map showing the primary triangulation of 1877-'78 672 



The collation of the illustrations of this Report is therefore : PH. I- VI, 1-10, VII-LXVI, 

 LXVIa, LXVII-LXXV, LXXVa, LXXVI, 1 map. 



Plates 1-10 have each an unpaged explanatory leaf, additional to the regular pagi- 

 nation of the volume. 



