V. S. GEOLOGICAL SURVEY 



BULLETIX to: plate XLV 



A. SUMMIT OF THE SAWATCH RANGE WEST OF SALIDA. 



From the automobile road leading to Gunnison and Montrose the traveler has a pood view of the 

 bleak summit of a high range. The trees make a persistent effort to creep up toward the crest, 

 .but the strong winds, low temperature, and drifting snow prevent them from reaching the top. 

 As shown in the foreground, many of tlie trees grow horizontally on the surface, and those that 

 stand upright are severely handled by the snow and wind. Photograph by Henry R. Hay, 

 Salida. 



B. CIRQUE ON A MOUNTAIN SIDE. 



This picture gives a good idea of the great amphitheaters or cirques scooped out of a mountain 

 side by the old glaciers. The glacier formed at the head of a ravine, and the ice llowetl out 

 toward the observer and down the ravine to the left. It cut into the slopes on all sides and 

 in time produced the cirque shown here. Photograph by Henry R. Hay, Salida. 



