684 J. H. SINCLAIR CRETACEOUS OF ALBERTA, CANADA 



above the coal horizon which has been taken as the upper limit of the 

 Belly Eiver formation. No basis of subdivision of these Edmonton- 

 Paskapoo sandstones is recognized either from the lithological point of 

 view or the paleontological. Perhaps later detailed work may result in 

 the finding of some paleontological evidence by which the Edmonton and 

 Paskapoo can be demarked in the foothill region. 



In conclusion, of the Cretaceous sediments of this area the following 

 measurements and the following formations appear certain : 



Feet 



Benton , 2,400 



Blairmore 1,700 



Kootenay 315 



4,415 



Taking into account the mass of unsubdivided sandstones above the 

 Benton formation, and especially the Belly River formation, which is 

 estimated at 1,400 feet thickness, it is safe to conclude a thickness of over 

 7,000 feet of Cretaceous sediments in this district. 



The process of sedimentation in this area may be expressed graphically 

 in figure 2, page 683. 



Summary 



The essential points of this paper may be summed up in the following 

 statements : 



1. Publication of a list of Benton fossils identified by Dr. J. P. Smith, 

 of Leland Stanford University, and collected by a joint expedition 

 financed by Mr. Harry R. Johnson, of Los Angeles, and the writer. 



2. The bringing of evidence to prove the non-existence of the Bearpaw 

 formation as a marine horizon in the foothills. 



3. Corroboration of the non-existence of the Claggett formation as a 

 distinct marine formation in the foothills. This fact was first definitely 

 established south of the International Boundary, in 1914, by Stebinger, 

 of the United States Geological Survey, and adequately presented in pro- 

 fessional paper 90 G, "The Montana group of northwestern Montana,'* 

 and about the same time it was confirmed by Dowling and others of the 

 Canadian Geological Survey in Alberta. 



4. Measurements involving thicknesses of the Blairmore formation and 

 the Benton formation on the North Fork of Sheep River and on the 

 Elbow River. 



