U. S. GEOLOGICAL SURVEY 



BULLETIN 612 PLATE XLTX 



A. VIEW DOWN CANYON OF NORTH FORK OF AMERICAN RIVER FROM CAPE HORN, CAL. 



The even sky ^^J^^^^",^^;^ former surface by whose elevation and western tilting the Sierra 



iMevaaa was brought into existence. Photograph furnished by Southern Pacific Co. 



. ^- BLUE CANYON. CAL 



TH..v.nageisnearthe lowerlimit. of the sn 



owsheds^^^Trees are white firs. Photograph furnished by Southern 



