POST-CRETACEOUS HISTORY OF WESTERN WYOMING 99 



Rocky Mountains, and especially from papers on districts outside 

 the one immediately considered. 

 Bibliography.^ 



I, 



A. EARLY EXPLORATIONS 



Fremont, Lieutenant John C. On the expedition to the Rocky Mountains 

 in 1841. A general account of the Wind River Range and the adjacent 

 Wyoming plateaus, but there is very little strictly geologic information. 



B. TERRITORIAL SURVEYS 



I. U.S. Geological and Geographical Survey of the Territories ("Hayden 

 Survey"), 1872-79. The geological exploring parties in immediate charge 

 of Bradley, Comstock, St. John, and Endlich, and under the general super- 

 vision of F. V. Hayden, made the first thoroughgoing reconnaissance of 

 • western Wyoming and parts of adjacent states. Considering the danger- 

 ous and unsettled character of the country, the lack of previous knowledge, 

 and the short time that could be devoted to each district, the results 

 obtained by these parties are remarkable and deserve the highest praise. 

 The work of Orestes St. John I have found especially trustworthy. The 

 members of these parties made a fairly good topographic map of the dis- 

 trict and reinforced it with perspective sketches which not only take high 

 rank for their artistic merit, but are geologically accurate. They cor- 

 rectly ascertained the long sequence of rock formations and interpreted 

 the structure of the ranges with but few mistakes. In their voluminous 

 reports one may find many suggestions about the geologic history of the 

 district here considered, and although some of these suggestions have not 

 been sustained by later studies, many of them will probably stand indefi- 

 nitely. Altogether, the Hayden reports contain the only comprehensive 

 and detailed account of the geology of western Wyoming that has been 

 written. 



C. SHORTER PAPERS ON SPECIAL QUESTIONS OR ON SMALL PARTS OF THE 



DISTRICT 



1. Eldridge, G. H. "Reconnaissance in Central Wyoming." U.S. Geol. 

 Survey, Bull, iig, 1894. Brief notes on the Wind River region, with the 

 first mention of folds affecting the Tertiary strata. 



2. Weeks, F. B. "A Reconnaissance in Jackson Basin," abstract in Science, 

 N.S., IX (1899), 454- 



3. Woodruff, E. G. "The Lander Coal Field," U.S. Geol. Survey, Bull. 316, 

 1907, pp. 242-43. A mere note. 



' Only such papers are here listed as have a direct bearing either upon the geology 

 of the district in question, or upon the problems of the Cenozoic era in adjacent parts 

 of the Rocky Mountain region. 



