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IV.—On the Preservation of Deposits of Incoherent Materials under Till or Boulder-clay

Published online by Cambridge University Press:  01 May 2009

James Geikie
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Extract

Those who maintain that Till or Boulder-clay has not only originated but accumulated underneath glacier-ice may sometimes have felt puzzled to account for the preservation of beds of more or less incoherent materials below a deposit which they have so many cogent reasons for believing to be a true moraine profonde.

Type
Original Articles
Information
Geological Magazine , Volume 5 , Issue 2 , February 1878 , pp. 73 - 79
Copyright
Copyright © Cambridge University Press 1878

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References

page 77 note 1 Canadian Journal, April, 1877.

page 78 note 1 It may reasonably be doubted whether interglacial deposits were always so very loose and incoherent at the time they were overridden by ice. My brother has suggested that when the ice-sheet advanced over a land-surface, the loose superficial deposits might be frozen so hard as to be capable of resisting a very considerable degree of glacial erosion.