ROCK GLACIERS IN ALASKA 



365 



'gif.i^f»^teiki^aa:s£jdb*Mi£:Xs 



Fig. 2. — Rock glacier on McCarthy Creek (Fig. i, No. i). Especial attention is 

 called to the absence of perennial snows at its head; to the longitudinal direction of the 

 surface linings in the upper portion, and to their concentric arrangement in the broad 

 lower portion. Photo by F. H. Moffitt. 



