364 GEOLOGICAL APPEARANCES 



channel of the Criny. Dr Hutton relates, that he witli some 

 difficulty climbed up the precipitous bed of a rivulet, which 

 comes from the mountain on the north side of Glen Tilt, and 

 which, from his description, I can only conceive to have been 

 the Criny. He there obtained a view of a section of the rock. 

 " We first," he says, " found the alpine schistus inclined as on 

 " the south side, and heading, or rising up, to this north hill ; 

 " immediately after which, we found the granite under the al- 

 " pine schistus, seemingly bedded in like manner, and run- 

 " ning parallel to the alpine strata." It did not strike me 

 that the granite in Glen Criny was in parallel beds ; though I 

 own that my examination was hasty, and I had only a distant 

 view of the lowest part of the Glen. 



143. In following up the course of the Criny, many blocks 

 of grey sienite, or rather sienitic greenstone, are seen, and 

 many also of granular quartz. The granular quartz on Cairn 

 y Chlannan and in Glen Criny, contains almost always either 

 specks of felspai", or minute cavities similar to those already 

 mentioned in the granular quartz of the Griurnon. Round 

 the head of the Glen, the blocks of sienitic greenstone lie in 

 great numbers, both on the side of Cairn y Chlannan to the 

 east, and on that of Cairn Vardenoch to the west. 



144. I ascended Cairn Vardenoch from the lower part of 

 Glen Criny, and kept along the broad ridge of it, winding 

 round to the westward, till I nearly reached that part which 

 overlooks Glen Merk ; and returning by a different track, on 

 the west side of the same ridge, crossed over it, and came 

 down into Glen Criny at a point higher up. In the whole of 

 this walk, except on that part of the ridge which lies towards 

 Glen Merk, I met with scarcely any thing but a small-grained 

 granite, having its felspar red. It appears in loose blocks, and 



the 



