CGRG Bibliography of Canadian Geomorphology
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Author : Fortier, G.
Date : 2005.
Title : Topographic and geologic controls of large-scale glaciotectonic deformation in southern and central Alberta: an integrated GIS and field approach.
Publication : 42nd Annual Conference, Department of Geography, University of Calgary, Friday, March 4, 2005.
Issue :
Page(s) :
Abstract
Glaciotectonic deformation is the ductile and brittle deformation of unconsolidated sediments and/or bedrock by the action of glaciers or ice sheets. It is generally accepted that deformation is controlled by two groups of factors. First are the substrate characteristics, including: topography, material strength and features, and hydraulic conductivity. Second are the characteristics of the glacier, including: thermal regime (cold versus warm based), velocity, and shear stress imposed on the underlying material by the moving ice. There is a continuum in the degree of deformation that can be experienced by sediment. This ranges from stacking (folding and faulting) to shearing (attenuation and boudinage) to mixing (homogenization). This project is a combined GIS and field approach to investigate the topographic and geologic controls of large-scale deformation (stacking) in central and southern Alberta. Within the GIS environment, a variety of attributes will be extracted from Quaternary geology, bedrock geology, and topographic data sets. The GIS analysis will first consist of a correspondence analysis to reduce the number of relevant variables and to identify the relationships between those features. Second, a two-group discriminant analysis will be used to distinguish between characteristics of deformed and undeformed zones. From this, the likelihood of deformation occurrences can be determined for the entire study area. Finally, field research will be conducted in five areas of the province to validate the results of the GIS modeling.
Bibliography of Canadian Geomorphology