CGRG Bibliography of Canadian Geomorphology
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Author : Alam, M. ; and Piper, D.J.W.
Date : 1977.
Title : Pre-Wisconsin stratigraphy and paleoclimates of Atlantic Canada and its bearing on glaciation in Quebec
Publication : Geographie physique et Quaternaire
Issue : 31(1-2)
Page(s) : 15-22
Abstract
Cores from tops of seamounts close to the continental shelf west of the Grand Banks contain sequences of alternatlng clays (representing glaciais) and foram nanno ooze (deposlted in warmer periods), back to the Pliocene. Although sedimentation ln the cores is controlled prlmarily by glacial conditions on the Grand Banks and Laurentian Channel, glacial history further inland can be inferred. The Wisconsin sequence shows two cool interstadials and one rather warmer one, correlative with the Plum Point, Port Talbot and St. Pierre Interstadials. Clay sedimentation during Wisconsin glacial stages was minor, suggestlng glaciers did not extend to the shelf edge. In the late Illinoian, there was a major influx of red sediments, indicating significant erosion of the Gulf of St. Lawrence and Laurentian Channel. Glaciation was more extensive than during the Wisconsin. Two Illinoian interstadials, with temperatures between those of the Plum Point and St. Pierre interstadials are recognized. Early Illinoian glaciation was the most severe yet recognized in the cores. Sedimentation appears to have been controlled by the advance of a Newfoundland - Labrador - E. Ouebec ice sheet across the Grand Banks.
Bibliography of Canadian Geomorphology