June, 1920] 



The Great Mageik Landslide 



M3 



Slide as remnants of former ridges which have been destroyed 

 for the most part by flying rocks. They are too numerous- 

 Nor could one suppose that if such ridges had been present 

 originally, every one of them would have been destro3^ed. Such 

 a hypothesis would, moreover, leave us with the problem of 

 accounting for the disappearance of both the material of the 

 erstwhile ridge and the rock which demolished it. The cones, 

 show, furthermore, no tendency to fall into transverse lines. 



Photograph by Robert F. Griggs 



A DIMINUTIVE "KETTLE HOLE" POND NEAR THE TIP OF 



MAGEIK SLIDE. 



This may have been caused by the melting away of a chunk of ice or snow. 



Some conspicuous cones are to be found in places where the 

 general mass of the slide, the portion strewn evenly on the 

 ground, forms a surprisingly thin veneer often less than a yard, 

 sometimes hardly a foot, in thickness. In such places the 

 total bulk of the smooth portion of the slide is less than that 

 of the mounds with which it is covered. When I thus- 

 discovered large mounds standing isolated in very thin 

 portions of the slide, it began to appear that the material 

 composing the mound must have traveled together as a unit 

 into its present position. In other words, the cones seem to 

 represent discrete masses of material which travelled together 

 throughout the motion of the mass and so settled down in the same 



