TABLE OF CONTENTS. 



Page. 



Title I 



Table of contents m 



List of illustrations vn 



Report of F. V. Hayden rx 



Letter to the Secretary ix 



PART I.— GEOLOGY AND PALAEONTOLOGY. 



Report of F. M. Endlich, S. N. D. [Plates I- VI] 3 



Report on the geology of the Sweetwater District 5 



Itinerary 5 



Chapter I. Introduction ; topography ; drainage ; lakes ; Indians ; settle- 

 ments, &c. ; "vegetation ; same 41 



Chapter II. Geology of the Wind River Range and country eastward . . 64 



Chapter III. Geology of the Sweetwater Valley and adjacent regions.. 95 



Chapter IV. Geology of the depressed Southern Area 119 



Chapter V. Economic geology of the Sweetwater District 142 



Conclusion 152 



Table of formations 154 



Appendix : Catalogue of minerals occurring in the Sweetwater Dis- 

 trict 1 157 



Report of C. A. White, M. D. [Plates 1-10] '. 159 



Report on the palaeontological field-work for the season of 1877 161 



Contributions to invertebrate palaeontology, No. 1 : 



Cretaceous fossils of the Western States and Territories 273 



Report of Orestes St. John, Geologist of the Teton Division [Plates 



VII-XLVI] 321 



Report of the geological field-work of the Te"ton Division 323 



Chapter I. Area and boundaries 323 



Chapter II. Southwestern section 327 



Chapter III. The Te"ton or Middle section 411 



Chapter IV. The Eastern section 442 



Chapter V. Archaean areas 474 



Report of A. C. Peale, M. D., Geologist of Green River Division [Plates 

 XLVII-LXXVI] : 



Letter of transmittal : 509 



Report on the geology of the Green River District : 



Chapter I. General introduction 511 



. , Area 511 



Former geological explorations 511 



, Drainage, mountain's, &c 512 



Geological formations 515 



Chapter II. Itinerary 516 



Green River City to Granger 516 



Granger to Fort Hall 517 



Fort Hall to Franklin. 519 



Franklin to Ogden 521 



Chapter III. Descriptive geology — Green River drainage area 523 



Green River Basin 523 



Wind River Mountains 524 



Drainage 525 



Oyster Ridge 533 



Ham's Fork Basin 534 



Ham's Fork Plateau b'S-i 



Absaroka Ridges 536 



Meridian Ridge 536 



Fontenelle Hogbacks 5§9 



Thompson Plateau 539 



Meridional Valley 539. 



Wyoming Range 541 



m 



