CGRG Bibliography of Canadian Geomorphology
Search Results
Author : Belanger, J.R.; and Klassen, R.A.
Date : 1983
Title : Les glaciers de l'ile Bylot : une fenêtre sur le passé [The glaciers of Bylot Island : a window into the past]
Publication : Geos
Issue : 12(4):
Page(s) : 10-13.
Abstract
The processes associated with modern glaciers provide a key to the origins and properties of the glacial sediments of past ice ages. The numerous glaciers of Bylot Island provide an opportunity for the study of modern systems of alpine glaciers in a polar setting. They are fed from icefields among the central highlands and flow outward across adjacent lowlands as large tongues of ice. Satellite images show clearly the extent of ice on the island and the areas of annual snow accumulation and melt. The near vertical margins of the ice tongues reveal a basal zone of sediment-rich ice overlain by dirt free glacier ice which forms the bulk of the glacier. Debris falling on the ice surface from valley walls is carried in rubble ridges along the glacier sides and in rubble strips along the ice tongue. Terminal moraines are formed in front of glaciers during expansion periods. During and after deposition, debris carried by the ice can be erodedand redeposited by meltwater streams.
Bibliography of Canadian Geomorphology