BULL. GEOL. SOC. AM. 



VOL. 19, 1907, PL. 37 



FiGLiiE 1. — XoitTH Fork op Big Ti.mber Caxyox 



View looking west from a point 5 or 6 miles east of tlie liead and sliowing lianging valley 

 and glacial trougli. I'hotograph by .T. E. WolfC 



Figure 2. — Big Timber Canyox 

 View eastward from a point 3 miles below tlie head, showing trough-like lower canyon 



GLACIAL PHENOMENA IN THE CRAZY MOUNTAINS 



