CONTENTS. 



LETTER OF TRANSMITTAL. 

 GENERAL REPORT. 



Report of November 1, 1860. 

 Report of November 27, 18(51. 



GEOLOGICAL REPORT. 



PREFATORY NOTE. 



LETTER OF TRANSMITTAL. 



CHAPTER I. 



Geology of the route between St. Louis and Santa Fe. 



General geological sketch — Independence to Dragoon Creek — Carboniferous strata — Character of coal and Coal 

 Measures of Kansas— Due to what causes — Coal-plants of Kansas — Molluscous fossils — Dragoon Creek to Cottonwood 

 Crock — Permo-CarhonitV'i'oiis and Permian strata — Difficulty of separating these format ions— (Jot Ion wood Creek to 

 Walnut Creek — Gypsum formation — Its parallelism — Walnut Creek to I'awnee Fork — Lower Cretaceous rockfl —Sand- 

 stones with impressions <>f leaves — Pawnee Fork to Cimarron — Tertiary strata — Arkansas basin — Its relat ion to t hat of 

 White River— Cimarron to Enchanted Spring — .Jurassic .' rocks — Enchanted Spring to Cottonwood Spring— Lower 

 Cretaceous and Tertiary beds — Cottonwood Spring to Canadian — Trap buttes and mesas near Raton Mountains — 

 Cretaceous rocks of the Canadian — Table-lands skirting the Rocky Mountains — Canadian to Las Vegas — Trap plateau 

 at Burgwin's Spring — Cretaceous strata at Fort Union and Las Vegas. 



CHAPTER II. 



Geology of the Vicinity of Santa Fe. 



Santa F6 Mountains — Granite — General geological features, its character and contained minerals — Relations of the 

 Santa ¥6 mountains — Placer Mountains — Cretaceous and Triassic rocks — Cretaceous lignite converted into anthra- 

 cite by an outburst of trap — Quid of the Placer Mountains— Copper — Iron — The Cereillos — Gold — Silver — Lead — 

 Copper — Iron — Turquoise — Ancient Chalehuitl mines — The Sandia Mountain — The Valles — Stratified rocks — Carbo- 

 niferous formations — Santa F6 section — Section at Pecos Village— I'erinn-Carhoniferous beds ■— (ivpsiim formation — 

 Section at San Jos6— Fossil plants — Cretaceous formation — Subdivisions of the system — Yellow sandstones of 

 Canon Blanco — Cretaceous — Sections at Gallisteo and Pope's Well — Tertiary beds of fresh-water origin. 



CHAPTER III. 

 General view of the Geology of the country bordering tiif. Uppeb Colorado. 



Bird's-eye view of the Colorado plateau and its surroundings — Mountain-chains by which the plateau is encircled — 

 Rocky Mountain system — Its extent and general structure — -Different features which it- presents on different paral- 

 lels — Different ranges of the Rocky Mountains, probably not of the same age — Rooky Mountain region has Buffered 



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