2 1 8 ROLLIN D. SALISB URY AND ELIO T BLA CK WELDER 



of twelve distinct glaciers or systems of glaciers were studied. 

 They occur in the following valleys : 



Length. 



1. Four tributaries of the South Fork of Clear creek, the sev- 

 eral glaciers uniting into one below - - - - about 



2. Little cliff-glacier, south of the South Fork of Clear creek, " 



3. Middle Fork of Clear creek ----- " 



4. South branch of the North Fork of Clear creek - - " 



5. North Fork of Clear creek ----- " 



6. South Fork of South Piney creek . . . . " 



7. North Fork of South Piney creek - - - - " 



8. East Fork of Big Goose creek *.-_." 



9. West Fork of Big Goose creek . - - . " 



10. South Fork of Tongue river .-.--" 



11. Willett creek -------- " 



12. Shell creek ----------- 



In addition to the above, glacial formations are known in the 

 following valleys, though they were not studied in detail during 

 the past summer : 



13. Trapper creek. 



14. North Fork of Medicine Lodge creek. 



15. South Fork' of Medicine Lodge creek. 



16. North Fork of Paintrock creek. 



17. Middle Fork of Paintrock creek. 



18. Buckskin Ed creek, 

 ig. Tensleep creek. 



The glaciers of the last glacial epoch made deposits consistent 

 with their various sizes and activities. In general, the lateral 

 and terminal moraines are more conspicuous than the ground 

 moraines, while the amount of drift is slight near the sources of 

 the glaciers, and great below. The lateral moraines are long, 

 sharp ridges, paralleling the sides of the valleys, and have rather 

 even crest-lines, 500-700 feet above the streams. Their proxi- 

 mal ends usually lie against the rocky sides of the glacial can- 

 yons at an elevation of about 10,000 feet, while their distal ends 

 merge into the stout terminal moraines. The outer fronts of the 

 terminal moraines frequently rise somewhat abruptly 400 to 500 

 feet above the valley below, and their surfaces often possess in a 

 notable degree the hummocky topography characteristic of these 

 formations. Valley trains are present below the terminal 

 moraines, but they afe not usually very conspicuous. 



