348 



EARL R. SCHEFFEL 



true drainage lines, and the fans and cones become covered with 

 vegetation. They would then be mistaken for forms of stream 

 origin. There is little doubt that many of the so-called alluvial 

 fans and cones in the area discussed have had this history. The 

 later modification may entitle them to their present names. The 

 delta-like products of the fluid slides would also originate such 

 forms. 



Fig. 2. — Two huge re-entrants meeting. These are the product of slides which 

 have progressed to near the hilltop. Note the steepening effect produced by slides 

 at their upper limit. The ultimate result, obviously, will be a reduction in the height 

 and gradient of the hill. Slides are still active over the entire surface of the re- 

 entrants; several terrace-like forms are discernible in their midst. The terrace 

 marking the base of the re-entrants, though covered with irregularly placed slide 

 material, has had its form determined by the Saltsburg sandstone which outcrops 

 beneath. 



MINOR TOPOGRAPHIC FORMS ASSOCIATED WITH SLIDES 



"Hoodoos"^ and ice pinnacles are frequently found associated 

 with shde materials. 



HOODOOS 



These are usually abundant on slide slopes after heavy rains. 

 Great numbers will sometimes stand out as distinct columns, but 

 on the steeper slopes the columns with their caps frequently coalesce 



'See article by Rolf A. Schroeder, Journal of Geology, Vol. XXVII, No. 6, pp. 



480-81. 



