218 THE LOCH LOMOND AND OTHER VALLEYS. 



In this wild and rocky gorge the strata are well ex- 

 posed, so that the data are easily observed. The bear- 

 ing almost coincides with that of Loch Leven, in 

 which the waters of the glen flows. The Caledonian 

 Canal, which consists of a series of connected lakes, 

 is also in the line of a great fault, and very many 

 cross-faults were noted along its route. 



" Loch Awe, from the nature of the rock, does not 

 as plainly tell its tale ; but the facts observed in the 

 vicinity of Portsonachan, and along its western side, 

 rather incline to the assumption that it is connected 

 with shrinkage breaks ; the joints having nearly the 

 same general bearing, and indicating that two sets of 

 master-joints aided in producing the physical features 

 here developed. Breaks or master-joints appear to 

 run into the two glens at the head of the loch. 



" In the Grampian Mountains the resemblance to 

 Connemara is, if possible, more striking, as the 

 country is very much faulted, like our own ; and I 

 cannot help thinking that any observer visiting the 

 district, supplied with the key obtained from a length- 

 ened examination of a similar region, may more truly 

 unlock their history, and, perhaps, cease to be i fully 

 persuaded that these valleys are to be looked upon as 

 the results, not of subterranean movements, but of 

 subserial denudation.' I may mention, that when 

 travelling through Savoie, Valais, and the Bernese 

 Oberland, I was greatly impressed with the numerous 



