Surficial geology, Swan Lake, Northwest Territories, NTS 85-C/1, 2, 7, and 8.: M183-1/457-2025E-PDF

"This map area largely encompasses flat-lying terrain of the Taiga Plains, and borders the northeastern slopes of the Cameron Hills. It is bisected by the Hay River, which flows northward across a shallowly incised (<15 m) Devonian carbonate platform. The Late Wisconsinan Laurentide Ice Sheet inundated the region, flowing southwest across the map area. Deglaciation is recorded by en échelon moraines, and erosional and depositional meltwater features that record the progressive separation of ice margins along the Hay River valley. This late-glacial phase included northward-flowing ice in the southwest part of the map, as recorded by northward-descending lateral moraines along the lower eastern flank of the Cameron Hills, and ice-contact meltwater features that illustrate progressive eastward ice retreat. Northward drainage of the ice-dammed glacial Lake Peace through Alberta's Meander River spillway likely formed the prominent Swan Lake spillway in the south end of this map. The map area is extensively blanketed by bog and fen deposits (65.8% of map area), and thermokarst terrain is widespread"--Abstract.

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