CGRG Bibliography of Canadian Geomorphology
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Author : Eyles, N.
Date : 1978
Title : Scanning electron microscopy and particle size analysis of debris from a British Columbian glacier : a comparative report.
Publication : Symposium on Scanning Electron Microscopy in the Study of Sediments, University College of Wales, Swansea, Sept. 24-25, 1977. Edited by W. Brian Whalley. Norwich, England : Geo Abstracts.
Issue :
Page(s) : 227-241
Abstract
On Berendon Glacier (British Columbia, Canada), subglacial, englacial and supraglacial components of the debris system can be defined with precision as a result of distinct geology. ... It has been suggested in the literature that the glacier bed adjacent to medial moraine debris is a site of enhanced scour as a result of the large quantities of englacial debris. Subglacial cavities in the terminal zone allow sampling of lodgement tills; quartz grains (1-2 phi; 0.5-0.25 mm) viewed under the Scanning Electron Microscope are generally typified by a 'microblock' surface texture indicative of intense comminution. Adjacent medial moraine quartz grains do not reveal this texture, but instead show features of natural release from bedrock. This suggests that moraine debris following initial derivation near the base of the glacier is passively transported through the basin; such sites would not appear to be characterised by enhanced scour nor comminution of debris. Grain size data supports this interpretation. (Author)
Bibliography of Canadian Geomorphology