100 



Mr. Bryck on the Parallel Roads of Locliaber. 



werj recently discovered, is not yet designated by any number. There is 

 another well-marked shelf, also recently discovered, near Kilfinnan, at the 

 northern end of Loch Lochy ; and in various parts of the district there 

 are traces of higher, and also of intermediate shelves. All these are laid 

 down upon the map referred to in the nest section. The principal shelves 

 are also marked on Johnston's Map of Scotland. Their situation is shown 

 in the annexed diagram. No. 1. 



a a Supposed original surface of rock, b b Present outline of tlie hill slopes. 



Shelf No. 4 is 847 feet above the sea, or about 500 feet higher than 

 the opening of Glen Koy, which i* about 347 feet above the sea. Shelf 

 No. 3 is 212 feet higher, or 1059 feet above the sea. No. 2 is 80 feet 

 above No. 3, or 1139 feet above the sea. Shelf No. 1 in Glen Glouy is 

 30 feet higher than No. 2, or 1169 feet above the sea. The lower Glen 

 Gluoy shelf is about 210 feet below the upper, or 870 feet above the sea, 

 and therefore 23 feet higher than No. 4 in Glen Roy. It might hence be 

 designated by the number 3' or SJ, being intermediate between No. 3 and 

 No. 4. * The shelf at Kilfinnan is 40 feet higher than No. 1, or 1209 

 feet above the sea. 



In Glen Roy each shelf runs farther towards the mouth of the glen 

 than the one above ; thus. No. 3 terminates farther down the glen than 

 No. 2, while No. 4 not only runs farther down the glen than No. 3, but 

 passes outside the glen, and can be traced on both sides of Glen Spean 



* These heights are given on the authority of Kobert Chambers, Esq., to whom 

 geologists are much indebted for the careful measurements obtained by him of a 

 great many points in the Lochaber district. 



