BULL. GEOL. SOC. AM. 



VOL. 23, 1911, PL. 38 



Figure 1. — Two Medicine Ridge of upturned axd beveled Cretaceous Sandstone 



In this part capped with coarse "quartzite gravel'' and farther west with pre-Wiscon- 

 sin glacial drift. Moraine of Two Medicine glacier of Wisconsin stage in the foreground. 



Figure 2. — Pre-Wisconsin gij^cial Till, largely Cemented to Tillite Conglomerate 

 exposed at west End of upper Part of Two Medicine Ridge 



PRE-WISCONSIN GLACIAL MATERIAL IN MONTANA 



