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The AAPG/Datapages Combined Publications Database
Journal of Sedimentary Research (SEPM)
Abstract
Tidal Current Control of Sediment Distribution in Northumberland Strait, Maritime Provinces
Kate Kranck
ABSTRACT
In Northumberland Strait muddy sediments are being deposited in areas with maximum tidal current speeds (amplitude of M2) of less than 0.5 knots while sands and gravels occur in areas where currents are stronger than this. There is a direct relationship between the median diameter of bottom sediments and maximum tidal current speeds. Tidal current asymmetries occur such that the speed and duration of the ebb and flood currents differ. Two types of asymmetries are distinguished: Langrangian and Eulerian. Tidal current asymmetries and the presence of a residual current cause a difference in the amount of sediment transported in the ebb and in the flood direction and hence a net sdiment transport.
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