EXPLANATION OF PLAT-KS 315 



Explanation of Plates 

 Plate 37. — Crescentic Gouges 



Figure 1. — Type forms. 



The direction of ice motion is indicated by the arrow. The 

 arrow also indicates scale, being one foot long. The nearest 

 gouge is solitary; most of the others are grouped in sets. 

 The blade of the knife is inserted in the conoid crack. 

 The rock face pictured inclines toward the observer at about 

 45 degrees. The material is granite. The locality is near th j 

 base of mount Huxley, Sierra Nevada, and is in the upper 

 basin of Evolution creek, a tributary of San Joaquin river. 

 In the upper part of the field the gouges are obscured by 

 lichens. 



Figure 2. — Gouges on upstream side of a prominence. 



The arrow, approximately one foot long, indicates the direction 

 of ice motion. Postglacial disintegration has removed the 

 glacial striae and polish and rounded the edges of the gouges. 

 The rock is granite; the locality is the North fork of Kings 

 river, Sierra Nevada. 



