The Quarterly journal of the Geological Society of London . overriding also the high land intervening. Another branch of the northern glacier, keeping to the west ofthe Lincoln ridge, and reinforced by the North-Sea ice, movedtowards Doncaster and up the Trent basin to the vicinity of Derby,where it met the Derwent glacier, and thence crept southwardalong the valley of the Soar into Warwickshire On the west, the Cheshire plain was invaded by ice from theIrish Sea which, diverting the glaciers descending from the 1 Without any disrespect to the opinions of those who think otherwise, Ishall assu
The Quarterly journal of the Geological Society of London . overriding also the high land intervening. Another branch of the northern glacier, keeping to the west ofthe Lincoln ridge, and reinforced by the North-Sea ice, movedtowards Doncaster and up the Trent basin to the vicinity of Derby,where it met the Derwent glacier, and thence crept southwardalong the valley of the Soar into Warwickshire On the west, the Cheshire plain was invaded by ice from theIrish Sea which, diverting the glaciers descending from the 1 Without any disrespect to the opinions of those who think otherwise, Ishall assume, in this paper, the correctness of the land-ice theory. 2 See, as to this, , Sketch of the Geology of Lincolnshire 1882,p. 21, and W. Topley, Quart. Journ. Geol. Soc. vol. xli (1885) p. 132. , moreover, has for many years held the opinion that the intenselyChalky Boulder-Clay of Lincolnshire was due to ice crossing the Wolds fromthe North Sea. See also, as to this, W. J. Harrison, Proc. Geol. Assoc, vol. xv(1898) p. 405. [ 4 fee. [ 473 ] ^
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