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VI.—Notes on Some Valleys of Erosion

Published online by Cambridge University Press:  01 May 2009

H. Alleyne Nicholson M.D., D. Sc., F.R.S.E.
H. Alleyne Nicholson M.D., D. Sc., F.R.S.E.
Affiliation:
Professor of Natural History and Botany in University College, Toronto.5
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Extract

During the summer of last year I had the opportunity of visiting various localities in the State of New York which are of great geological interest; and I was particularly struck by the numbers of valleys which are exclusively the work of the rivers by which they are occupied, as compared with those which are in every way caused by mechanical disturbance of the beds through which they run.

Type
Original Articles
Information
Geological Magazine , Volume 9 , Issue 97 , July 1872 , pp. 318 - 321
Copyright
Copyright © Cambridge University Press 1872

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References

1 Geol. Mag. Vol. VI., p. 483; VII., pp. 93, 267.

2 The same species. is described as tenanting burrows, especially in winter, by Mr. Hodgson, Jameson's Edin. Journal, 1846, p. 396.

3 Linnæus gave this name, I find, from a belief that it bored limestones. Mr. N. Goodman informs me that the burrows at Monte Pellegrino are made by a fourth species of Helix.

4 See for a fuller discussion of this a paper by Mr. Rofe, Geol. Mag. Vol. VII., p. 4.