196 KNOWLTON 



About 8 or Q miles west of Bridger, Montana. 



Plalanus nobilis Newb. 



Populus incequalii? Ward. 

 About 25 feet below the last collection. 



Taxodium occidniale Newb. 



Populus cuneata ? Newb. 



Platanus sp. 

 About 25 miles northwest of Red Lodge, near center sec. T)T), T. 6 N., R. 18 E. 

 300+ above base. 



Platanus raynoldsii Newb. 

 Same area as last, sec. 36, T. 5 N., R. 18 E. Within 300 feet of contact 

 with Eivingston beds. 



Aralia notata Newb. 



Populus sp. 



8. GLENDIVE, MONTANA, AND VICINITY. 



Returning to the Miles City field, as already set forth, the con- 

 ditions are known for 40 miles to the east. Down the valley of 

 the Yellowstone identical conditions prevail to near the vicinity of 

 Iron BlufT where, at the mouth of Sand Creek, some 12 miles south- 

 west of Glendive, an anticlinal fold brings the marine Cretaceous 

 to the surface. The exposure is about 100 feet in thickness above 

 the level of the river, on both sides of which it may be observed. It 

 is upper Pierre (Bearpaw) in age and contains a rich fauna which 

 has been listed by Dr. T. W. Stanton.*^ This exposure, which is 

 known to continue for some distance to the southeast, is thought by 

 Prof. A. G. Leonard" to be connected with a similar area along the 

 extreme eastern edge of Custer County, Montana, and adjacent 

 counties in North Dakota. 



Immediately above the Pierre, and in apparent conformity, are 

 150 feet of beds the lower half of which is made up of sandstones 

 and shales, and the upper half of a brownish sandstone. While 

 these beds are in the position of the Fox Hills, their age is in doubt. 

 No invertebrates have been found, the only fossils being two or three 

 small collections of dicotyledonous plants which are so fragmentary 

 as to be undeterminable. According to Leonard'" they do not 



" Bull. U. S. Geol. Surv., 316, 1907, p. 196. 

 " L. c, p. 197. 

 " Loc. cit., p. 197. 



