CGRG Bibliography of Canadian Geomorphology
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Author : Forbes, D.L., Shaw, J. And Taylor, R.B.
Date : 1995
Title : Differential preservation of coastal structures on paraglacial shelves: Holocene deposits of southeastern Canada.
Publication : Marine Geology
Issue : 124(1-4)
Page(s) : 187-201
Abstract
Recent work has advanced our understanding of mixed sand-gravel littoral systems in glaciated regions. New insights include the nature and causes of coastal instability and conditions for preservation of Holocene barrier deposits on paraglacial shelves. The best-preserved relict barrier structures recognized on the inner shelf of southeastern Canada are interpreted as postglacial lowstand deposits, initiated under stable to slowly rising relative sea level in areas of substantial shelf relief. A largely intact early-Holocene gravel foreland survives at 38 m present water depth, its preservation attributed in part to sediment volume and a partially protected location. The mechanism by which this structure was abandoned and overstepped is unclear, but may be related to accelerating sea-level rise. In some cases, barriers keep pace with sea-level rise for some time before being overstepped or reworked landward. The duration and extent of preservation depend in part on the deposit volume, as smaller accumulations are consumed and reworked more quickly.
Bibliography of Canadian Geomorphology