CGRG Bibliography of Canadian Geomorphology
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Author : Christiansen, E.A.
Date : 1987.
Title : Verendrye valley and the Glidden esker, Saskatchewan: subglacial and ice-walled features in southwestern Saskatchewan, Canada
Publication : Canadian Journal of Earth Sciences
Issue : 24(1):
Page(s) : 170-176.
Abstract
Verendrye valley is more than 100 km long, about 1 km wide, and at least 225 m deep. Southward, the valley grades into the Glidden esker, the surface of which rises about 280 m above the lowest point in the valley. The sediments in the valley and esker are 205 and 75 m thick, respectively, and form a fining-upward sequence from sand and gravel at the base to silt with sand interbeds in the uppper part of the sequence, which in turn, is covered by a blanket of glacial lake clay. The concave-upward longitudinal profile of Verendrye valley, the genetic relationship between Verendrye valley and the Glidden esker, and the age of the features indicate the valley and esker were formed by a subglacial stream during the last deglaciation 15 500 - 14 000 years ago. The fining-upward sequence of sediments in the valley and esker suggests the subglacial valley formed time transgressively by headward erosion while the glacier margin remained stationary at the Glidden esker.
Bibliography of Canadian Geomorphology