TABLE OF CONTENTS. 



Page. 



Prefatory note 3 



First Annual Eeport, EMBRACING Nebraska, 1867 5 



Report of F. V. Hayden, United States Geologist 7 



The salt basins of Lancaster County 8 



The cultivation of fruit and forest trees , 10 



Otoe and Nemaha Counties 12 



Forest and fruit trees 14 



Eichardson County 16 



Bluff formation 18 



Pawnee County ■. 21 



Gage County , 25 



Jefferson County 28 



Brief notes on the present condition of the Otoe Indians 32 



Johnson County 35 



Additional notes on Lancaster and Cass Counties 38 



Additional notes on Sarpy and Douglas Counties 41 



Geology of Nebraska north of the Platte Kiver 45 



Dakota group 50 



Fort Benton group 53 



Niobrara division 54 



Fort Pierre group 54 



Tertiary formations of Nebraska 55 



Second Annual Eeport, embracing Wyoming, 1868 65 



Eeport of F. V. Playden on the geography of the Missouri Valley 67 



Geological explorations in Wyoming Territory : 



First letter „ 76 



Second letter 88 



Third letter 89 



Third Annual Eepokt, embracing Colorado and New Mexico 103 



Letter of F. V. Hayden to Secretary of Interior 105 



Geological report of F. V. Hayden 109 



Introduction 109 



Chapter I. From Cheyenne to Denver Ill 



11. From Denver to Colorado City 137 



III. From Colorado City to Spanish Peaks 147 



IV. From Fort Union to Mora 158 



V. From Fort Union to Santa Fe 162 



VI. From Santa Fe to Placiere Mountains and return » 166 



Vn. From Santa Fe to Taos 169 



Vin. From Taos to Fort Garland 170 



IX. From Fort Garland to South Park 175 



X. Trip to Middle Park 181 



XI. The gold and silver mines of Colorado 187 



XII. Eeview of leading groups »189 



Mines and minerals of Colorado, by Persifor Frazer, jr 201 



Acriculture of Colorado, by Cyrus Thomas 229 



