PLATE I 



A. LOWER HALF OF SOUTH FORK OPPOSITE MILL D. BIG COTTONWOOD CANYON, 



LOOKING NORTH 



Shows broad U-shaped glacial trough, with terminal moraine at the junction 



of the main canyon 



B. CONGLOMERATE AT THE BASE OF THE CAMBRIAN QUARTZITE IN LITTLE COTTON- 

 WOOD CANYON, JUST BELOW ALTA 



