CGRG Bibliography of Canadian Geomorphology
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Author : Dionne, J-C.
Date : 1983
Title : Frost-heaved bedrock features: a valuable permafrost indicator
Publication : Geographie physique et Quaternaire
Issue : 37(3):
Page(s) : 241-251
Abstract
Frost-heave bedrock features are periglacial forms produced by the vertical displacement of bedrock fragments. Blocks, frost-wedged from bare bedrock along joints, are raised above the general surface by heave. Although mentioned in the literature of the late 19th century, they have been described and studied in detail only recently. They are widespread in the northern hemisphere, notably in Canada, Greenland and Spitsbergen, where they develop in lithologies with well-developed systems of joints. Commonly, heaved blocks exhibit weathered and lichen-covered surfaces except at their base where freshly exposed rock indicates recent heaving. They result from frost processes, particularly from wedging and heaving due to pressure of the freezing of free-water in joints. Active and most non-active features are located in permafrost regions.
Bibliography of Canadian Geomorphology