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Mar 31, 2000
Special Report
… Laurentide ice Sheet varied in thickness and thermal basal regimes … of the ice sheet when ice thickness was at a maximum. The … due to the irregularity of drift thickness and bedrock topography. …
Dec 31, 2000
Special Report
… locally can exceed 30 metres in thickness. Recent deposits, … alluvial, colluvial, and organic sediment make up Unit E. … Leslie, …