222 



WILLIAM S. COOPER 



West of the area just described, across the shingle flat, upon 

 the spur that descends from Mt. Whitehorn, is a talus cone of 

 exceptional interest. It is remarkably symmetrical in form, and 



Fig. 3. Talus cone northwest of Lake Kinney. Birches at right and near top 

 of cone; climax forest (partly burned) in center. Lake Kinney shingle flat 

 below, bordered at base of cone by subclimax forest. 



upon it the birch and conifer stages are very plainly seen. Where 

 the slide is most active, falling material has kept certain paths 

 free of all vegetation. Between these strips grow lines of 

 birches. Over a part of the cone the violence of the rock bom- 



