THE LOCH LOMOND AND OTHER VALLEYS. 217 



of the Clyde valley would indicate ; the fiord may have 

 been covered with ice, or have had an " ice-foot," on 

 which was caught most of the debris brought down 

 from the hills to be floated out to sea (little or none 

 of it remaining to be deposited in the lake-basin to 

 silt up the deeps), and if the ice remained longer in 

 the upper portion than in the lower, the former would 

 have been more excavated. These suggestions would 

 apply to the neighbouring fiords also, and to some of 

 the bays in the north of Ireland. 



Our colleague, Mr H. Leonard, M.R.I.A., thus 

 writes of some of the Scotch valleys : u In the 

 Highlands of Scotland I was greatly struck with 

 the form of the ground \ the resemblance to that of 

 portions of Connemara being complete. The rocks 

 are similar in composition, and the physical fea- 

 tures could hardly fail to command attention, while 

 the absence of timber increases the opportunities for 

 observation. The faults here, as in the west of Ire- 

 land, run principally through the cols or maums, that 

 of Glencroe passing through the maum at ' Rest and 

 be thankful.' The historic valley of Glencoe lies 

 along a line of break in its schistose rocks, which is 

 very prominently marked from about the centre to 

 the top of the glen, where the main fault appears to 

 split into a number, and these are in many cases cut 

 across by other faults. The glen of the Blackwater 

 Lochs is another example of a valley along a break. 



