BULL. DEPT. GEOL. UNIV. CAL. 



VOL. 3, PL. 43. 



A 



Glacial cirque to the southwest of Sawtooth on the Great Western Divide. 

 The steps and tarns of the cirque are very characteristic. The middle sky line 

 shows aretes due to encroachment of other cirques from the opposite side of 

 the range. 



B 



Looking south down the crest of the Great Western Divide from the 

 summit of Sawtooth. Illustrating the glacial reduction of mountain crests 

 by opposing cirques. The cirque in the lower right hand corner of the picture 

 is the one shown in A. 



