ia4 



Charles Maclaren, Esq., on the Existence of 



Fig.l. 



%^ 



— \ \ 



O Part of Gare Loch. 



p q. The projecting tongue of land at the village of Row, 

 which has its name from a Gaelic word signifying " a point." 

 At p its breadth is perhaps a furlong, while its height may 

 be SO feet above the high water, or 40 above the low-water 

 line. The western half, ^, is only visible at low water, and 

 the length of both parts may be about half a mile. Its entire 

 height from the bottom of the loch is probably not less than 

 60 feet. I regret not having examined its structure, and can 

 only state what I was told in the steamer, that the whole 

 consists of gravel. At Roseneath, on the opposite side, there 

 is a projecting point, s, also of gravel, which seems its west- 

 ern extremity ; and the soundings in Mackenzie's Chart shew 

 that a shoal extends from the one to the other. Midway be- 

 tween s and q the depth is only 6 fathoms ; a little southward 

 from the ferry it is 9 fathoms ; a little northward, 18 ; and 

 about half-way between s and the head of the loch the depth 

 increases to 27 fathoms. These measures are all at low water. 

 The situation of the point pqin the loch is shewTi in fig. 2, 

 where it is marked w. 



A terminal moraine is a long narrow mound or bank of 

 loose matter accumulated at the foot of a glacier, and ex- 

 tending across the lower end of the valley which that glacier 

 occupies. Supposing Gare Loch to have been the ancient 

 site of a glacier, the bank of gravel at Row correctly repre- 

 sents in form, position, and materials, its terminal moraine. 

 The glacier, in the course of its existence, no doubt had seve- 

 ral terminal moraines, and some of them lower down than 

 this, for the striated clayslate is found some furlongs south- 

 eastward ; and all the southern portion of the loch below the 

 ferry * y, is shallow, compared with the northern. But the 



