. Annals of the Andersonian Naturalists' Society. CHANNELS AND GLENS OF AYRSHIRE. 63. Ate* friM #eds App Water.—The App, owing to its running between high steep-sided hills, has not left the old valley in scooping out the drift-beds, except towards the very head of the glen, where the burn turns suddenly, leaving the boulder-clay, and runs on rock, the old valley of the App at this part being still filled with drift, covered by peat. A number of the streams, as the Afton, Craig's Burn, Polgown, Pundeavon, Pitcon, Routenburn, Powgreen, Potian, Burn Anne, and others, cut through rock probably in
. Annals of the Andersonian Naturalists' Society. CHANNELS AND GLENS OF AYRSHIRE. 63. Ate* friM #eds App Water.—The App, owing to its running between high steep-sided hills, has not left the old valley in scooping out the drift-beds, except towards the very head of the glen, where the burn turns suddenly, leaving the boulder-clay, and runs on rock, the old valley of the App at this part being still filled with drift, covered by peat. A number of the streams, as the Afton, Craig's Burn, Polgown, Pundeavon, Pitcon, Routenburn, Powgreen, Potian, Burn Anne, and others, cut through rock probably in the bottoms of the old glens, or sideways from them ; though some of them may have old glens placed at some distance from the new ones. Hollows at the bases of the hills.—A number of the Ayrshire rivers have considerable hollows at the bases of the hills, as for instance the Powgreen at the base of Cuff Hill, the Garnock above the falls, the Afton at Montraw, the Gass Water at the base of Wardlaw, the Nith near Waterhead, the Girvan at Loch Bradan, the Bottom at the base of Blackcraig, the Tig below Strawarren Fell, the Clocklowie at the base of Clocklowie Hill, the Haw near Laggish (the hollow), the Deugh above Glenenlee, and others; and at the north and north-east bases of Corsincone there are deep hollows—the culminating feature in this respect being the hollow in which Loch Doon is situated. These hollows have certainly never been formed by the rivers, and have possibly been made by the joint action of the streams, the first glacier-ice and the sea, and subsequently received their present forms by glacier-ice, as we clearly see by the manner in which Loch Doon's rocky shores are moutonnee and striated. Some of them, as Loch Doon, may be due to subsidence. Positions of the post-glacial glens.—The positions of the rocky post-glacial glens, in a marked degree, depend on the formations. Please note that these images are extracted from scanned page images that may have
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