I860.] 



JAMIESON DRTFT, ABERDEENSHIRE. 



357 



is 2953 feet above the sea ; it is encompassed by bai'e granite crags 

 and blocks of the same nature. The stream issuing from it over the 

 sxvrface of these rocks makes a rapid descent, down a steep slope of 

 perhaps 400 or 500 feet, into the glen below. Here there is a re- 

 markable assemblage of mounds and tumuli, some of them reaching 

 a height of 100 or 150 feet above their base (fig. 6). 



Fig. Q.—TJie Top of Glen Berry. 



I. Loch Etichan. 



2, 2. Mounds of gravel. 



No sections occur at this point to show their internal structure ; 

 but their steep slopes present shoals of gravelly debris, chiefly of 

 granite: there are, however, many fragments of gneiss and lami- 

 nated quartz, and even some of a hornblcndic nature. This struck me 

 as singular, seeing that the whole glen and mountain-group above, 

 and their immediate neighbourhood, are believed to he exclusively 

 of granite. If this opinion bo correct, it tells strongly against these 

 fragments being glacier-borne to their present position. Many oi the 

 quartz-fragments are partially water-worn. Some large boulders are 

 scattered over the surface of these mounds, all of which, without 

 exception, arc of granite similar to that of the adjoining hills. 



The deposit forming these mounds rises to corresponding heights 

 on both sides of the stream, and continues down the glen for about 

 half a mile or so, diminishing gradually in thickness until it ceases 



