Plate XVIII. 
Wind River Mts. S.S.E. S. mag.) Gros Ventre Mts. Sta. XIII. 
nT AT EATEN 
To er Oe 
— 
Gap between Wind River and Gros Ventre Ranges. 
a Drift-covered wooded and open slopes. } Archean, south of Green Iiver Canon. c Paleozoic. qd Trias. e Tertiary. 
(From Station XX VIIUT.) 
