Surficial geology, McCann Lake, Northwest Territories, NTS 75-G. : M183-1/466-2025E-PDF

"The McCann Lake map area lies in the Rae Province of the Canadian Shield. Quaternary deposits are extensive and thick, with bedrock outcrops scattered throughout. Till is extensively streamlined to the west-southwest by late deglacial ice flow from the Keewatin Ice Divide and is incised by west-southwest-flowing subglacial meltwater corridors that extent across the map area, spaced 5 to 15 km apart. The ice-flow chronology is recorded both in the landforms and the striae record. Rare measurements record an old flowset oriented northwest-southeast. Well-defined indicators in cross-cutting relationships reveal a regional clockwise rotation in ice-flow directions evolving from an old southward to a late deglacial westward flow. Short-lived proglacial lakes, as evidenced by wave-cut scarps, beaches, terraced outwash and ice-contact deltas, and patches of glacial lake sediments, occupied paleodrainage areas to Hudson Bay and possibly headwaters of the Mackenzie River through the Taltson River system"--Abstract.

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