7° 



THE POPULAR SCIENCE MONTHLY 



El Capitan, 3,100 Ft. Sheer. Most striking illustration of massive, resistant granite. 



As massive monoliths of smooth, sand-papered granite, appear El 

 Capitan, Sentinel Eock and Dome, Glacier Point and the Half and 

 North Domes. These burnished, jutting promontories attract far more 

 attention than do the hollowed-out recesses of the tributary canyons. 

 And yet, it is more among the shadows of these deep-furrowed clefts 

 that the geologist must look for the most convincing evidences of the 

 actual sculpturing of the Yosemite Valley. The domes stand out more 

 as mighty monuments signalizing their resistance to erosion, rather 

 than as facetted and modeled masses of rock. But between these 

 promontories are zones of fissured strata showing the shearing and 



