The Geology ok Lochrutton. l'o 



and produced a flood plain stretching- towards the Bar. 

 Farm, and in this long- deep hollow a loch was rapidly 

 formed. It was finally silted up, as the Lade escaped round 

 the end of the drum below the Water Works. The sedi- 

 mentation is level rather than shelving-. At the junction with 

 the Barr Burn the banks show an exposure of a black peaty 

 deposit over five feet deep; the base not seen. 



Dromore Loch. 



Dromore Loch was formed by a rock barrier at the head 

 of the Glen gorge, and a few yards down stream from the 

 junction of Bogrie and Lade. /Vs the erosion of the rock 

 barrier at Lakehead Cottage was slow, the flood plain was 

 consequently large — covering- several fields of Dromore 

 Farm. The bottom of this lochan has been filled with 

 moraines, giving a very shallow depth of water. The top 

 of three drums can be seen, covered with alluvium, in 

 Dromore meadow. About fifty yards from the bridge a 

 buried drum can be seen, running- east and west — a relic of 

 the Crocketford ice. The sedimentation in Dromore Loch 

 is not peaty, but shingly. Nearer to the Water Works 

 corner the stones increase in size, until they show the 

 irregularity of a fluvio glacial deposit as it escapes from a 

 retreating ice front. 



There is no evidence of lake silt having been carried 

 from Lochrutton bottom and deposited here. The accumu- 

 lation in these hollows corresponds in quantity and char- 

 acter with the boulder clay which has been removed by the 

 stream from the Moat banks. 



Loch's Ori«n.\l Depth. 



This survey of the various conditions that gave rise to 

 the formation of the Loch will also furnish explanations of 

 the orig-inal contour of the lake floor before sedimentation 

 had set in. A transverse section across the middle of the 

 Loch would then show, stretching- under the water on the 

 eastern side, a slope corresponding to the dip of the rock 

 surface above water ; while, on the western side, there would 

 be a sudden fall down to the buried channel. In this section 



