CGRG Bibliography of Canadian Geomorphology
Search Results
Author : Grant, A.C.
Date : 1971
Title : Distributional trends in the recent marine sediments of northern Baffin Bay
Publication : Maritime Sediments
Issue : 7(2):
Page(s) : 41-63
Abstract
The nature of the recent sediments in northern Baffin Bay, and their textural properties relative to water depth, bottom configuration, and the agents responsible for their transport were studied by analyzing 69 samples. Auxiliary lines of research included determination of the organic matter and calcium carbonate content of the sediments, and evaluation of the lithology and abrasion of the gravel-size material. The gravel content is highest in a zone approximately coincident with the paths of surface currents. Distribution on the basis of median grain diameters illustrates shoreward progression from fine to coarse sediment, and clay deposition in nearshore bottom depressions. Offshore sand accumulations occur on topographically high parts of the basin floor. Carbonate distribution relates primarily to regional geology and to water circulation, and gravel lithology reflects similar control. Ice-rafting is the dominant agent of sediment transport in the Baffin Bay region. Ice movement is confined mainly to the lateral zone of surface currents, and gravel distribution in the bottom sediment is determined accordingly. The distribution of finer sediments depends upon hydraulic conditions. Clay accumulates in the central, deep-water area, but may also be deposited within the gravel zone where the bottom water is undisturbed by current action. Where water movement affects the bottom, sorting of the sediment occurs by virtue of non-deposition of fine particles.
Bibliography of Canadian Geomorphology