CGRG Bibliography of Canadian Geomorphology
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Author : David, PP.
Date : 1989
Title : Abraded bedrock surfaces, cratère du Nouveau-Quebec
Publication : Le cratere du Nouveau-Québec : monographie portant sur l'histoire naturelle du cratère du Nouveau-Québec incluant un rapport de l'expédition de 1988 / Edited by Michel A. Bouchard. Collection Environnement et Géologie
Issue : 7:
Page(s) : 137-138
Abstract
Samples 1 and 2 consist of medium to coarse-grained quartzite rock with manganese and iron oxide deposits on fracture planes imparting a brownish tint to the rock. The fracture planes are closely spaced and appear at the rock surface as faint lines. Samples 3 and 4 are from massive, foliated quartzite dyke rocks. Whereas the rock of sample 3 appears to fracture to very fine grains, that of 4 abrades to a little coarser grains. These same samples have closely-spaced fine fracture planes without any particular surficial appearance on the sample surface which otherwise is abraded to a smooth finish. These samples also show an internal wavy structure that imparts a wavy appearance to a fresh fracture surface. There are small fracture pits at the surface of some of the samples which may be due to postglacial frost pitting or other processes; they did not form either through glacial erosion or during sampling or handling.
Bibliography of Canadian Geomorphology