Postglacial Rates of Denudation by Soil Movement, Free Face Retreat, and Fluvial Erosion, Mont St. Hilaire, Quebec

Average rates of denudation over periods ranging from 11 800 years to 12 800 years at sites on Mont St. Hilaire, Quebec were estimated as follows:[Formula: see text]The rates of fluvial denudation at Mont St. Hilaire are lower by a factor of one-half than published short term fluvial denudation rate...

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Bibliographic Details
Published in:Canadian Journal of Earth Sciences
Main Authors: Pearce, Andrew J., Elson, J. A.
Format: Article in Journal/Newspaper
Language:English
Published: Canadian Science Publishing 1973
Subjects:
General Earth and Planetary Sciences
Yukon
Northern Sweden
Spitsbergen
Online Access:http://dx.doi.org/10.1139/e73-008
http://www.nrcresearchpress.com/doi/pdf/10.1139/e73-008
Description
Summary:Average rates of denudation over periods ranging from 11 800 years to 12 800 years at sites on Mont St. Hilaire, Quebec were estimated as follows:[Formula: see text]The rates of fluvial denudation at Mont St. Hilaire are lower by a factor of one-half than published short term fluvial denudation rates in areas of similar relief and climate. The rates of free face retreat at Mont St. Hilaire are similar to the lowest rates recorded in Spitsbergen, northern Sweden, and in the Yukon Territory.The polygenetic geomorphic history of Mont St. Hilaire and the low rates of denudation estimated in this study together indicate that existing slope and valley forms cannot be explained adequately by the present processes operating at the observed rates.Talus accumulation has obscured some Pleistocene features but other processes have not.

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