FORT UNIOISr OF CRAZY MOUNTAIN FIELD, MONT. 



15 



probably an inexact correlation. Probably equivalents of the Mowry, 

 Thermopolis, Frontier, and some other Wyoming formations are 

 included. A prominent but local sandstone member has been called 

 "Big Elk." 



Douglass at first (1902) called the overlying beds "Niobrara", 

 but their more exact correspondence with the Eagle and Claggett is 



