Studies in the Sierra 



73 



Fig. 10. — North Face of Half Dome, Yosemite Valley 



acteristic of the rock. Along the front toward A H may be seen 

 the stumps of slabs which have been successively split off the 

 face. At H may be seen the edges of residual fragments of the 

 same slabs. At the summit we perceive the cut edges of the con- 

 centric layers which have given the curved dome outline, B B. 

 At D, a small gable appears, which has been produced by the 

 development of diagonal cleavage planes which have been cut 

 in front by vertical planes. After the passage of the main Tenaya 

 Glacier in the direction of the arrows, small glacierets seem to 

 have flowed down in front, eroding shallow groove channels in 

 the direction of greatest declivity ; and even before the total re- 

 cession of the main glacier a wing-shaped ice-slope probably 



