U. S. GEOLOGICAL SURVEY 



BULLETIN 612 PLATE XXV 



A. VIEW OF THE VALLEY OF V/EBER RIVER FROM WITCHES ROCKS. 



On the monument at the left is a cap which protects the rock under it because its pebbles are cemented 



together more firmly than these below. 



B. THE DEVILS SLIDE. 



These beds consist of layers of hard limestone separated by soft shale of the Twin Greek formation, of Jurrasslc 

 age, and were originally fornned in a horizontal position but during one of the mountain uplifts were upturned 

 to a vertical position. 



