ABSTRACT: Description morpho-sedimentologique d'un system eolien de haut de falaise, au cap Sandtop a l'ile de'Anticosti (Quebec). [Morpho-sedimentologic description of a cliff-tyop eolian system, Cap Sandtop, ile de'Anticosti (Quebec)].

CGRG Bibliography of Canadian Geomorphology
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Abstract

At the southeast extremity of le de'Anticosti, eolian deposits of variable texture cover almost entirely a marine terrace 15 m above the present sea level. The coastal cliff at Cap Sandtop is subject to eolian, most likely in response to erosion of the sedimentary rocks and strong exposure to surface to high velocity surface winds. The high exposition to wind coming from the sea, particularly easterly winds, is responsible for the transportation of over a few metres of disk-shaped fragments characterized by a high flatness index which are derived from the coastal escarpment, and for the deposition of coasr-grained detrital covers and fine-grained eolian sediments. The maximum extent of those sediments is within 50 m of the cliff and they cover an area of 15,000 m2. Eolian activity is more likely to occur during winter after the formation of an ice bank connected to the shore, preventing the waves from reaching the cliff and reaching the cliff and reducing the spindrift and soil humidity on the terrace. Snow-free or thin packed or snow cover site conditions appear to be the key factors inducing deflation and transport of debris from the local rock wall to the terrace. The formation of granule ripples on over 4000 m2 of the most exposed part of the terrace reflects the intensity of gusts coming from the sea.

Bibliography of Canadian Geomorphology