Geological magazine . on, especially in localities where strong currents musthave been in operation. 3. Nor, finally, is there any proof of a great submergenceprior to these latest works of the ice. This is where the advocatesof such a submergence join issue. They maintain that there was afirst or general glaciation, then a deep submergence, then a partialor local glaciation, by which all distinct traces of the submergencewere removed. But a little reflection will show (a) that it is veryimprobable any subsequent local glaciation could remove all tracesof the seas presence at high levels, supp
Geological magazine . on, especially in localities where strong currents musthave been in operation. 3. Nor, finally, is there any proof of a great submergenceprior to these latest works of the ice. This is where the advocatesof such a submergence join issue. They maintain that there was afirst or general glaciation, then a deep submergence, then a partialor local glaciation, by which all distinct traces of the submergencewere removed. But a little reflection will show (a) that it is veryimprobable any subsequent local glaciation could remove all tracesof the seas presence at high levels, supposing it had been sea marks a horizontal line and goes into every nook and crannyof the land along the line; whereas the glacier marks a descendingline, and keeps to one main channel, not branching off in everydirection as the waters do. The area of the glacier, therefore, couldnot coincide with that of the submergence so as to remove all tracesof the latter. Then (6) if such traces had been entirely removed. EiQ. 1.—Sketch Map showing position of Mound (M.) Fig. 2.—General Aspect of the Mound. from every glen like this G-len Fruin, they should at least bediscernible in the heaps of debris which the ice has left near themouths of such glens. All over the country there are innumerableglacial mounds and heaps—the sweepings of glens which, in thecase of the alleged submergence, must have been sheltered inlets ofthe sea, favourable to almost every form of marine life. Theseheaps, as well as the Boulder-clay of the country generally, shouldabound in fragments of marine fossils, if there had been such a ^ See Trans. Geol. Soc. of Glasgow, vol. ix. p. 109. DECADE III.—VOL. VIII.—NO. IX. 27 418 Reviews—Flower and Lydekher^s submergence, instead of being, as they are on the whole, quitedestitute of organic remains. This argument is not founded on a supposition, but on a the ice can be shown (by the striae on the rocks,the stones in the drift, etc.) to
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