SMITHSONIAN INSTITUTION 



Fig. i.- 



-Green River, showing moraine in the mid-distance which forms the 

 lower lake, Green River Lakes, Wyo. 



Creek, above Green River Lake; 



Fig. 3. — \ iew across Clark Fork River from Beartooth Mountains. Canyon 

 shows as a line, and is cut in sedimentary rocks. The Absaroka Mountains 

 to the south are composed of lava flows. 



