212 THE LOCH LOMOND AND OTHER VALLEYS. 



they incline more or less to either side, from being 

 deflected at the junctions of the transverse valleys 

 with the main one. All the deepest spots coincide 

 with one or other of these junctions. 



The shallows in the lake may possibly be due, in 

 part, to accumulations made when the lake was a fiord ; 

 similar shallows, however, are not found in the fiord 

 of the Clyde, and it is probable that since the lake 

 became fresh water they have been considerably aug- 

 mented by debris carried on to them by the rivers 

 .and streams, especially the bank in the vicinity of 

 the Douglas Water, which has all the character of a 

 delta, shelving suddenly at its margins, especially 

 northward. 



As already stated, the features of the adjoining 

 country and the shapes of the bottom of the lake- 

 basin have a connection between them. The irre- 

 gular deep, east of Ben Dhubh, occurs where the 

 nearly N. and S. breaks and the N. 30 E. breaks 

 meet or cross one another. The sudden deepening 

 north of Hunter's Bank seems due in part to a fault 

 with a down-throw to the north, coming into the main 

 valley from the east. The shallow to the south of 

 the deepest spot is evidently on the N.W. side of the 

 fault-line which is associated with the Tarbet valley. 

 This appears to be a very recent fault, and it has con- 

 siderably shifted the main fault of the valley. The 

 Inversnaid and Inveruglass faults also slightly shift 



