CGRG Bibliography of Canadian Geomorphology
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Author : Fillon, R.H.; and Harmes, R.A.
Date : 1982
Title : Northern Labrador Shelf glacial chronology and depositional environments
Publication : Canadian Journal of Earth Sciences
Issue : 19(1):
Page(s) : 162-192
Abstract
Huntec deep-tow records, 3.5 and 12kHz echo-sounder profiles backed by airgun reflection, cores, and 14C dates delineate 10 mappable acoustic/morphologic units between 57 degrees N and 61 degrees N on the northern Labrador Shelf. The data suggest the following sequence of glaciation and deposition: (1) ice grounds on the shelf and upper slope during the glacial maximum; (2) shelf-basinal and bank portions of the ice sheet begin basal melting before 9770 and ca. 10,260 BP, respectively; (3) degrounding of the ice in shelf basins and admission of sea water by 9770 BP, perhaps at first beneath ice shelves; (4) deposition of fine-grained glacial muds in basins as runoff from actively ablating valley glaciers on Labrador finds its way into fjord-like embayments in the ice sheet (ca. 9770-8380 BP); and (5) deformation of sediments on shallower portions of the shelf and upper slope possibly by Hudson Bay, Foxe Basin, or Ungava Bay surge ice exiting outer Hudson Strait, ca. 8380-7500 BP.
Bibliography of Canadian Geomorphology