CGRG Bibliography of Canadian Geomorphology
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Author : Catto, N.; and Catto, G.
Date : 2010.
Title : Geomorphology, sedimentology, and management issues, Hog Island (Pemamgiag) Sandhills, PEI.
Publication : Prairie Summit - Le sommet des Prairies. Joint Conference of Canadian Association of Geographers, Canadian Cartographic Association, Canadian Geomorphology Research Group, Canadian Remote Sensing Society / Conférence conjointe de l’Association canadienne des géographes, l’Association canadienne de cartographie, le Groupe canadien de recherche en géomorphologie, la Société canadienne de télédétection. June 1 to 5, 2010. Regina, Saskatchewan.
Issue : Program and Abstract Volume.
Page(s) : 94.
Abstract
The Hog Island Sandhills barrier island and dune complex, north coast of PEI, is one of the least disturbed coastal dune complexes in Atlantic Canada. The Sandhills, including four segments of dune-backed coast, encompasses 1496 ha, extending linearly for 113 km. The complex consists of transverse, parabolic, shield, and dome dunes. Smaller features superimposed on larger ones indicate both multiple periods of dune development and irregular reworking and redeposition of sand on dune surfaces. Internal structures indicate deposition by grain avalanching, viscous grainflow, and kinetic seiving. Erosional scoured surfaces containing adhesion ripples, adhesion warts, rain pit structures, and niveo-aeolian features are common. Crestal platforms, formed where periodic snow cover allows sand grains to adhere to the surface, are evident on transverse dunes. Ongoing deflation of the dune complex is indicated by blowouts. Saucer blowouts are dominant in areas not subject to intensive human disturbance. Trough blowouts, indicative of human disturbance, range from 0.5 m to 4 m in depth. Large trough deflation hollows are present, with depths locally exceeding 11 m. Anthropogenic pressure is the primary influence controlling the observed change from saucer to trough development, and the enhanced deflation evident in the trough blowouts and deflation hollows. The Hog Island Sandhills complex has retained most of its natural landscape features. However, increased tourism without appropriate forethought will result in significant damage to the Hog Island Sandhills from erosion of the dune complex, particularly the development of trough blowouts and deflation hollows, increased erosion, and substantial alteration of the dune landscape
Bibliography of Canadian Geomorphology