326 



ELIOT BLACKW ELDER 



surface as they are on the Pinedale moraines, and those which remain 

 show plainly the effects of weathering;^ (h) lakes are rare or absent, 

 but hollows filled with peat mark the sites of many that have 



Fig. 43. — Sketch map showing the dissection of the old moraine (Bull Lake [?] 

 stage) at the junction of Fish Creek and the Gros Ventre River. 



disappeared; (c) the principal creeks have cut not merely sharp 

 ravines but rather wide flat-bottomed valleys through the terminal 



^ A fact possibly related to the weathered condition of the older drift is the 

 observed scarcity of cedar trees on the older moraines at BuU Lake, while such trees 

 are so abundant on the adjacent new moraines that the latter appear much darker. 



