CGRG Bibliography of Canadian Geomorphology
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Author : Evans, D.J.A.
Date : 1996
Title : A possible origin for mega-fluting complex on the southern Alberta prairies, Canada
Publication : Zeiteschrift fur Geomorpholoige, Supplement Band
Issue : 106:
Page(s) : 125-148,
Abstract
The geomorphology and stratigraphy of a mega-fluting complex in the lower Red Deer River drainage basin of southern Alberta, Canada, are used in conjunction with adjacent stratigraphic sequences to reconstruct a regional depositional history and genetic model relating to ice advance during the last glacial maximum. A basal grey till (LFA 3) is loaded by coarse gravels (possibly originating as esker sediments) and subglacial cavity fill deposits (LFA 4/5) which may have provided the stable core beneath a deforming till layer (lower LFA 5 and/or lower LFA 6). North of the Red Deer River the fluting complex contains several small sub-flutings which may relate to streamlined esker beads or outer bends of esker meanders deposited during an earlier glaciation or a phase of increased subglacial meltwater discharge. The fluting was therefore initiated by linear development rather than a point source. Future interpretations of the most recent subglacial depositional forms on the Earth's surface must account for possible pre-existing landforms and sediments and their influence on glacier dynamics and substrate rheology.
Bibliography of Canadian Geomorphology