Reconnaissance surficial geology, Willow Lake, Northwest Territories, NTS 85-L / [authors, D.E. Kerr, P.D. Morse, and S.A. Wolfe].: M183-1/304-2016E-PDF

"Glaciolacustrine sediments, associated with glacial Lake McConnell, were deposited as veneers over till in the broad, poorly drained low-lying areas of the northern, central and southeastern regions of the map area, below 290 m a.s.l. They are commonly overlain by organics and exhibit thermokarst activity. Glaciofluvial sediments and some bedrock ridges were reworked into glaciolacustrine beaches in the eastern lowlands. These beaches, occurring between 220 to 290 m a.s.l., mark the decreasing elevation of the glacial lake over time due to isostatic rebound. In the south, the Horn Plateau, rising to over 700 m, and consisting of till blanket, hummocky till, moraine complex, and colluvium on its slopes, remained above the limit of glaciolacustrine inundation. Crag-and-tails, drumlins and drumlinoids record a westward ice flow during the last glaciation, with local northwestward and southwestward diversions around the Plateau. A series of small moraine ridges on the Plateau may mark the retreat of ice margins or stagnating lobes during deglaciation about 11–10 ka BP"--Abstract.

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