CGRG Bibliography of Canadian Geomorphology
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Author : Catto, N.R.
Date : 1980
Title : Quaternary geology of the western Cypress Hills region, Alberta and Saskatchewan
Publication : Unpublished M.Sc. thesis. University of Alberta, Edmonton
Issue :
Page(s) : 239 pp
Abstract
The Western Cypress Hills region was glaciated at least three times during the Quaternary. Throughout this time, the surface of the Cypress Hills Plateau remained unglaciated. The most extensive of the glacial events, Phase A, occurred some time prior to the Wisconsin. Phase B ice, of Illinoian or early Wisconsin age, covered much of the region and was responsible for the formation of Lake Wild Horse and several lakes in the Pakowki basin during its retreat. Phase C ice, of Late Wisconsin age, achieved a maximum position marked by a pronounced moraine extending northeast from Etzikom, Alberta, to a position south of Medicine Hat and thence easterly to Irvine and Walsh, Alberta. This phase marked the maximum extent of Late Wisconsin ice into the region. Isostatic depression of the Pakowki basin at this time produced a second series of lakes. Retreat of the Phase C glacier was followed by a period characterized by a gradual climatic amelioration, which climaxed between 8500 and 7000 B.P. Climatic conditions then altered, and a cooler, moister period began, which continues to present.
Bibliography of Canadian Geomorphology