POST-CRETACEOUS HISTORY OF WESTERN WYOMING 327 



moraines, and the tributaries have largely dissected the lateral 

 moraines into short pieces. 



The frayed character of the terminal moraines is indicated in 

 Figs. 43 and 44. At the mouth of the DuNoir River near the west 



Fig. 44. — Sketch map showing the dissection of the old moraine (Bull Lake [ ?] 

 stage) at the mouth of Crystal Creek, Gros Ventre Range. 



end of the Wind River basin, the position of the old terminal 

 moraine is occupied by a spacious river floodplain; nevertheless, 

 the old lateral moraine, now 200-300 feet above the river, is still 

 largely intact and can be readily identified by its hummocky 

 topography. On the north side of Dell Creek, on the south side 



