WORK IX THE STATES IN 1901 107 



boundary, examined the local structure and stratigraphy of the Rocky 

 mountains. Winchell studied the problem of the age of the coal in the 

 Great Falls region with special reference to its relation to that of the 

 Little Belt region. Shaler worked on the general and structural geology 

 of the Tobacco Root mountains. 



Knight studied the Newcastle oilfield of Wyoming and made a de- 

 tailed investigation of the Laramie quadrangle with special reference to 

 underground waters. Adams studied water suppty problems in Laramie 

 and Converse counties. Two parties visited the state for the purpose of 

 collecting vertebrate fossils, one operating at the north near Como lake, 

 the other at the south in Albany county. 



Gross, continued area! work in southwestern Colorado; Emmons re- 

 visited the Leadville mining district and investigated recent develop- 

 ments, and Adams studied geologic structure in Weld county with 

 reference to artesian problems. Matthew and Brown made a collection 

 of vertebrate fossils in the eastern part of the state, and a party from 

 the Carnegie Museum successfully exploited the Jurassic formations 

 near Canyon. 



In Texas, Phillips examined state lands west of the Pecos river with 

 respect to their mineral value. Hill completed field work on the general 

 geology of the Rio Grande region. The oilfields in the southeastern 

 part of the state were studied by Phillips, Harris, Hayes, Adams, and 

 Kennedy. Cragin continued laboratory studies on the Jurassic forma- 

 tions. Gridley made a successful search for remains of Pliocene horses. 



In the southern part of New Mexico, Permian and Upper Carbonifer- 

 ous strata and faunas were studied by Girty. 



Jaggar and Palache conducted an areal geologic survey and an inves- 

 tigation of mineral deposits in Yavapai county, Arizona. Lindgren 

 made a geologic and economic survey of the Clifton-Morenci mining- 

 district, and Ransome of the Globe mining district. Blake made a re- 

 connoissance of the vicinity of the Rincon Mountain region with reference 

 to the possible presence of petroleum, investigated the lacustrine forma- 

 tions and diatomite deposits of San Pedro valley, and continued strati- 

 graphic and structural studies in various mountain ranges. Walcott 

 and Gilbert studied the Algonkian rocks of the Grand canyon of the 

 Colorado. 



In western Utah, Gilbert studied the stratigraphy and structure of 

 mountain ranges and the physiographic expression of faults. 



In connection with a reconnoissance survey of the international bound- 

 ary, there was a study of the general geology of northern Idaho by 

 Willis, and of northern Washington by Ransome and G. 0. Smith. 



XVI— Bull. Geol. Soc. Am., Vot,. 13, 1901 



