190 Charles Maclaren on 



it opens into Glen Eck. An unbroken circular wall of rock 

 shuts in the south end S, forming the upper half of the glen 



Fig. 1. — Glensluan. 





"W 



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til 



■ '«/*,•-■.., 



into a very perfect amphitheatre. The north end N, is rather 

 narrower, owing to the smaller elevation of its sides, and the 

 whole when mapped, has a slightly curved form, the bearing 

 of the upper portion being one point (or 11°) east of north, 

 and that of the lower, two points. It is a trough, excavated 

 in the mica slate, and conforming in its direction to the strike 

 of the beds (see the cross section, Fig. 2), so that the stream- 

 lets which descend from the eastern ridge E, flow over the faces 

 of the strata, while those descending from the western ridge W, 

 flow over their edges. In consequence apparently of this dip 

 of the rock to the west, the east side of the glen has in section 

 a slightly convex, the west a slightly concave outline, and the 

 latter is more highly inclined than the former. Both sides 

 have a pretty thick coat of clay sand and gravel, which sup- 

 ports a strong growth of coarse grass, rushes, ferns, and heather. 

 Scarcely any rock is seen, except in the beds of the rivulets, 

 or occasionally on the west side at t, 400 feet above the bottom 

 of the valley, where the edges of some of the beds of slate 

 protrude, in consequence perhaps of their greater firmness. On 

 the same side, but lower, and towards the foot of the glen, a 

 bed of blue compact limestone crops out and is quarried. The 

 Sluan, a rapid stream, running from south to north, discharges 

 the collected waters of the glen into the river Cur near K, 

 which river flows here through a flat meadow, and falls into 

 Loch Eck, about two miles eastward. 



The bottom of the lower end of the glen for about 1800 feet 

 from the meadow at K, is occupied by a remarkable series of 



