328 



The Ohio Joumal of Science [Vol. XX, No. 8, 



terminus is composed more largely of fine materials, among 

 which are great chunks of black peat soil. In some places these 

 masses of peat are scattered irregularly through the debris, 

 but in others they are thrown into rude rows. (See page 351). 

 The lateral edges, several miles back from the terminus, 

 have a different character still more distinct from the moraine 

 ridges of a glacier. For here the edge may be said to be concave, 

 instead of convex. That is to say, instead of piling up, the 





Photograph by Robert F. Griggs 



TERMINAL EDGE OF MAGEIK SLIDE. 



.Although obUterating the alder thickets wherever it touched them, it showed no 



tendency to form ridges resembling moraines. At this edge the slide 



covered the ground only four or five feet deep. The 



black chunks are masses of peat. 



debris slumped away from the highest level it reached, leaving 

 a hollow rather than a ridge. This is particularly well shown 

 along the foot of one of the encircling mountains, so located as to 

 have stuck squarely out into its path. Here it ran over the 

 TDarrier, clearing the vegetation and soil from the rock to a 

 height of nearly 100 feet above the present level of the debris. 

 But instead of piling up against the obstruction, as a glacier 

 would have done, it slumped away again, leaving the hillside 



i 



