114 On the Judith River, Montana 



over the Claggett shales. These, Professor Cope 

 called Fort Pierre. 



On July 24, 1914, a paper of mine appeared in 

 "Science," in which I undertook to show that the 

 Dog Creek beds were equal to the Edmonton 

 Beds of Alberta. And those at Cow Island, 

 should be correlated with the Belly River Beds 

 of Alberta, with the Pierre shales between. I 

 took Professor Cope's view. He believed the 

 Judith River Beds were above the Pierre and 

 Fox Hills Group of the Cretaceous and called 

 them "The Judith River Beds" or "Cretaceous 

 No. 6." After two seasons of exploration of the 

 Belly river series in Dead Lodge Canyon, of Red 

 Deer River Alberta, in connection with our study 

 of the Dog Creek and Cow Islands rocks I was 

 obliged to accept the conclusions of Hatcher and 

 Stanton, in their fine work on "The Geology and 

 Paleontology of the Judith River Beds." The 

 whole series here, and on Red Deer are without 

 doubt Ft. Pierre. The Judith River and Belly 

 River beds were local elevations above the Pierre 

 Ocean. We actually added to the mass of evi- 

 dence to this effect, by the discovery of sixty 

 feet of Bear Paw Shale on top of the Judith 

 River beds at Taffy Creek, a branch of Dog 

 Creek to the east. We also learned how easy it 

 was for Hayden, and Cope to make the mistakes 

 they did in their hurried survey of the bad lands. 

 I walked miles over both Bear Paw and Clag- 

 gett shales, and found it difficult to tell them 



