Earth History

History of Glaciation in Southern Saskatchewan

“Today, much of the present landscape of Saskatchewan owes its origin to glacial erosion and Glacial Deposition of the Laurentide Ice Sheet. The effects of this glacier can be conveniently separated between the north and south of the province using the edge of the Precambrian Shield as a boundary. The hard exposed bedrock of the Precambrian Shield and proximity to the ice centre of the Laurentide ice sheet in Hudson Bay resulted in a landscape dominated by glacial erosional features in the north. As the ice sheet advanced it eroded and transported rocky materials southward, leaving an erosional surface behind: areal scouring, roches moutonées, whalebacks, and striae are common erosional landforms. The most common depositional landforms in the north are the eskers that extend hundreds of kilometres and illustrate the southward movement of materials during glacial retreat in the many meltwater channels that developed in the glacier.”

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