CGRG Bibliography of Canadian Geomorphology
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Author : Hale, P.B.; and McCann, S.
Date : 1992
Title : Rhythmic topography in a mesotidal low-wave-energy environment.
Publication : Journal of Sedimentary Petrology
Issue : 52(2):
Page(s) : 415-430
Abstract
The intertidal zone in Craig Bay extends 1200 m offshore making it the broadest non-estuarine tidal flat on the east coast of Vancouver Island, British Columbia, Canada. Superimposed on the low gradient foreshore (1:360) are up to fourteen low amplitude ( less than or equal to 0.6 m) ridges with an average wavelength of 86.3 m. These are permanent fixtures of the intertidal zone exhibiting considerable stability in both form and position. They are generally symmetrical in cross section and in no instance is a landward slip face evident. The ridges have developed in medium-to-fine sand atop a coarse deltaic platform. The thickness of this surficial sand unit is often equal only to the height of the ridges, and the gravel sustrate is frequently exposed in the depressions. The morphology, sediments, and hydraulic environment of this rhythmic foreshore were examined to provide insight into the factors controlling ridge development and maintenance.
Bibliography of Canadian Geomorphology