REPORT OF F. M. ENDLICH, S. N. D., GEOLOGIST OF THE WHITE 



KIVER DIVISION. 



LETTER OF TRANSMITTAL. 



Washington, D. C, J.j)ni 9, 1877. 



Sir : I have the honor herewith to submit my report for 1876 as geol- 

 ogist of the White River division. In accordance with instructions re- 

 ceived, we left Cheyenne, Wyo., August 14, 1876, and started for the 

 field August 16 from Rawlins, Wyo. After a march of one hundred and 

 eighty-five miles, we arrived at the White River Indian agency, where 

 we commenced operations. October 12 we returned to that place, hav- 

 ing completed the geological and topographical survey of the area 

 assigned to us. During that time we obtained sufiQcient data for the 

 purposes of preparing geological and topographical maps of a section of 

 country comprising over 3,800 square miles. 



The subjoined report is divided into three chapters and a conclusion. 

 Of these the first treats of the physical character of the country exam- 

 ined, the second of its structural and geognostic features, and the third 

 contains a short discussion upon the intimate connection between litho- 

 logical constitution of rocks, stratigraphy, and special orographic feat- 

 ures. In the " conclusion," the various geological formations rencoun- 

 tered in Colorado are briefly reviewed. A comparative table of forma- 

 tions throughout the State has been added. 



I wish leave to express my sincere thanks to Mr. G. B, Chittenden, 

 topographer directing, and to Mr. E. N. Dickerson, jr., meteorological 

 observer, for their uniform kindness and co-operation during the field - 

 season. To Mr. W. H. Holmes I am indebted for the preparation of 

 illustrations. 



It gives me pleasure here to acknowledge the courtesy and material 

 aid extended to us by Mr. Danforth, agent at the White River Indian 

 agency, and Mrs. Danforth. To them we owe, in a great measure, the 

 friendly footing upon which we were at once placed with the Utes, be- 

 sides many favors that are most heartily appreciated by those accus- 

 tomed to camp life and camp fare. 



Hoping that this report may meet your requirements, 

 I am, sir, very respectfully, your obedient servant, 



FREDERIC M. ENDLICH. 



Dr. F. V. Hayden, 



Qcologist-in-charge JJ, 8. Geological and 



Geographical Survey of the Territories. 



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