GLACIAL LAKE SASKATCHEWAN AND LAKE AGASSIZ DELTAS IN EAST-CENTRAL SASKATCHEWAN WITH SPECIAL EMPHASIS ON THE NIPAWIN DELTA

The Nipawin delta extends eastward from the town of Nipawin in east-ce ntral Saskatchewan. The Prince Albert and Fort a la Corne deltas forme d in Lake Saskatchewan at the mouths of the South and North Saskatchew an rivers, whereas the Nipawin and Mossyvale deltas formed in Lake Aga ssiz at the mouth of the Saskatchewan River. These deltas became lower in elevation and younger eastward. Clays beneath the Nipawin and Moss yvale deltas can be traced beneath the Prince Albert and Fort a la Com e deltas with little change in thickness, suggesting that most of the clays beneath the Nipawin and Mossyvale deltas were deposited during t he formation of the Prince Albert and Fort a la Corne deltas. The Nipa win delta formed between 10200 and 9500 BP. The Campbell strandline (E merson phase) was the shoreline of the Nipawin delta. The Mossyvale de lta formed about 9500 BP. The surface of the Mossyvale delta (McCauley ville level) is about 40 m below the surface of the Nipawin delta (Cam pbell level).