abstracts: geology 265 



tailed description of the anticlines and of the formations that appear 

 to contain oil or gas in southern Alberta and northern Montana. The 

 general conditions in this region suggest that drilling in the Blackfeet 

 Indian Reservation would have about the sime chance of success as in 

 the adjacent region in southern Alberta, extending from the inter- 

 national boundary northward to Calgary, a region in which drilling 

 bj r over 40 companies during the last three years has been slightly 

 successful. R. W. S. 



GEOLOGY. — Anticlines in central Wyoming. C. J. Hares. U. S. 

 Geological Survey Bulletin 641-1. Pp. 233-279, with map and 

 19 figures. 1916. 

 The area herein designated central Wyoming covers nearly 5000 

 square miles in Natrona and Fremont counties west of Casper and south- 

 east of Lander, and includes no proved oil fields. This area was in- 

 vestigated primarily to ascertain the possibilities of oil, and as a result 

 it was found that the Carboniferous and Cretaceous formations which 

 produce oil in other Rocky Mountain fields are well developed in cen- 

 tral Wyoming and in places the oil seeps from them, but in only a few 

 places are these formations covered by impervious shale and within 

 reach of the drill in folds favorable for the accumulation of oil and gas. 

 The favorable folds are pointed out, but even these most favorable 

 folds may be barren of oil. R. W. S. 



GEOLOGY. — Oil shale in northwestern Colorado and adjacent areas. 



Dean E. Winchester. U. S. Geological Survey Bulletin 641-F. 



Pp. 139-198, with bibliography, 10 plates and 2 figures. 1916. 

 This report contains information showing the quantity and quality 

 of oil that may be distilled from the richer beds of shale, the number 

 of such beds at the different localities examined, and the general dis- 

 tribution of the shale throughout northwestern Colorado and adjacent 

 parts of Utah and Wyoming. The results show that the shale of the 

 Green River formation will yield a vast quantity of oil, gas sufficient 

 to carry on the process of distillation, and fertilizer enough to enrich 

 most of the farms of the Middle West, and that this reserve is ready 

 whenever the demand is sufficient to warrant the establishment of a 

 new industry to supplement the failing supply of petroleum from the 

 oil fields. R. W. S. 



