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The AAPG/Datapages Combined Publications Database
CSPG Bulletin
Abstract
Some Observations on Folding from Western and Arctic Canada
ABSTRACT
Recent articles by Carey and O'Driscoll (1962) assist in interpreting structural phenomena observed in Western and Arctic Canada. Three of these phenomena are discussed in this paper. 1) The geomorphology of part of Bathurst Island of the Canadian Arctic Archipelago is a result of the erosion of Variscan folds obliquely superimposed upon a Caledonian structural system. 2) Upper Silurian and Lower Devonian siltstones exposed on the flanks of Variscan folds on Bathurst Island have commonly been thinned during folding. Although these are basically concentric folds, the siltstones behave in a manner characteristic of similar folds. 3) A Triassic siltstone-shale sequence has commonly been thickened along the crests of anticlines in the foothills of northeastern British Columbia. A major decollement probably occurs within this sequence.
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