310 GEOLOGICAL APPEARANCES 



tain, though it has still to find its way by a succession of falls 

 to the bottom of Glen Tilt. Towards the upper end of the 

 valley, the breadth of it is contracted to that of the river, and 

 the declivities are lower. 



16. To the south-east of Forest Lodge, the lowest steep of 

 the mountain is succeeded by a more gradual ascent to the top 

 of Cairn ioorchie, which is from 1500 to 1800 feet above 

 the valley. Beyond this, after a small intervening descent, 

 an easy slope leads to the top of Cairn Kin Callum, 

 one of the three broad summits of Ben y Gloe, the highest 

 ridge in this neighbourhood. Cairn Gowar, the most lofty 

 of the three, was ascertained by General Roy to be 3650 feet 

 above the level of the sea, and Cairn Kin Callum cannot be 

 much lower. The third summit is Cairn Leea, v/hich lies at 

 the south-west end of the ridge. 



17. To the north-west of the Lodge, the bank that forms the 

 valley, is immediately overtopped by another steep, of which 

 the highest point is called the Griurnon. Mr Playfaiu deter- 

 mined the elevation of this above the valley, by means of a 

 base measured in a flat close to the Lodge, and found it to be 

 1590 feet. From the Griurnon, a broad ridge extends, in a 

 north-westerly direction, for nearly a mile and a half, and rises 

 a few hundred feet to the pointed summit of Cairn y Chlan- 

 nan. The height of this mouutam above the sea is probably 

 about 2800 feet. 



18. The opposite sides of this part of Glen Tilt present a 

 striking contrast in their surfaces. The sOuth-eastern side is most- 

 ly covered with soil, bearing either good herbage, or heath j and 

 shews but little of the rock, either fixed or loose. Along the 

 north-western side, the mountain has in many places a craggy 

 brow, the ruins of which lie thickly scattered over the decli- 

 vity below, so as frequently to cover the ground. This is 



particularly 



