U. S. GEOLOGICAL SL'RVEY 



BULLETIX 707 PLATE LVn 



A. MOU^'TAIN SHEEP. 



Occasionally during the winter mountain sheep may be seen on the cliffs in the Colorado River 

 canyon. The deep snow drives them down from the higher tops, and they find pasture on the nar- 

 row ledges along the canyon wall, from which they may gaze on the passing trains. 



B. UPPER END OF CANYON OF COLORADO RIVER. 



The regular masonry-like walls are the striking feature of the upper end of this beautiful and 

 picturesque canyon. The beds of rruartzile are so even and continuous thiit they seem to have 

 been dressed and laid by man. The walls rise abruptly from the river, so in building the auto- 

 mobile highway it was neco-ssary to tunnel through these beds at some points. Photograph 

 by the Detroit Publishing Co.; furnished by the Denver & Rio Grande Western Railroad. 



