Abstract

The Nipawin delta extends eastward from the town of Nipawin in east-central Saskatchewan. The Prince Albert and Fort à la Corne deltas formed in Lake Saskatchewan at the mouths of the South and North Saskatchewan rivers, whereas the Nipawin and Mossy vale deltas formed in Lake Agassiz at the mouth of the Saskatchewan River. These deltas became lower in elevation and younger eastward. Clays beneath the Nipawin and Mossyvale deltas can be traced beneath the Prince Albert and Fort à la Corne deltas with little change in thickness, suggesting that most of the clays beneath the Nipawin and Mossyvale deltas were deposited during the formation of the Prince Albert and Fort à la Corne deltas. The Nipawin delta formed between 10 200 and 9500 BP. The Campbell strandline (Emerson phase) was the shoreline of the Nipawin delta. The Mossyvale delta formed about 9500 BP. The surface of the Mossyvale delta (McCauleyville level) is about 40 m below the surface of the Nipawin delta (Campbell level).

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