CGRG Bibliography of Canadian Geomorphology
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Author : French, H.M.; and Bjornson, J.B.
Date : 2008.
Title : Mountain-top detritus and patterned ground in the Gaspesie Mountains, Quebec, Canada.
Publication : Geographia Polonia
Issue : 82(1):
Page(s) : 29-39.



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Abstract

Mountain-top detritus characterizes the two high summits of the Gaspesie Mountains, eastern Canada. It is suggested that these angular rock-rubble accumulations developed from the disintegration of coarse-grained igneous bedrock exposed to thermal stress and ice segregation during prolonged episodes of permafrost formation in the cold periods of the Pleistocene. Frost wedging and frost heaving ("jacking") were the primary mechanisms. Today, climatic conditions on the summits permit only thin and marginal permafrost bodies. Stone nets and stripes are developed where a residual bedrock-derived mantle is present. They reflect frost-induced movements within the active layer. The latest of these movements probably occurred during the cold period following the LGM and persisted into the mid-Holocene. The transition from nets to stripes relates to slope angle.

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Bibliography of Canadian Geomorphology