Glacial Moraines on Mount Leinster. 335 



adjoining cliffs on to them slide off, and form at their margins 

 moraine-like accumulations ; from which I would suggest that 

 an operation somewhat similar, but on a much larger scale, took 

 place in the Craan Coom on Mount Leinster, the blocks in the 

 marginal heaps having partially slid down over the glacier, and 

 been partially carried on the downward creeping mass of ice from 

 the granite cliffs between A and B, Plate XXVIII., as indicated 

 by the lines of blocks on the glacier, the marginal cliffs being more 

 than 500 feet higher than the highest blocks, and over 1,000 feet 

 above the lowest blocks ; the space that was occupied by the 

 glacier during the time of its smaller and later development, is 

 comparatively free from blocks. 



This coom gets the name " craan" from the numerous blocks in 

 it. The N.W. coom of this mountain on its county Carlow side, 

 in which there are no very striking indications of glacial action, 

 is called Coolasnaghta, or the snow-corner. 



In summer the lines of blocks are much concealed by the 

 remarkably tall bracken growing about and among them; they 

 are therefore best seen in winter and early spring. 



SciEN. Proc. K.D.S., Vol in.,PT vi. 2 D 2 



