Pollen and Algae from Late-Wisconsin Glacial Lake Great Falls Sediments, Holter Lake, Montana

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A stratigraphic sequence situated along the east side of Holter Lake contains silts and muds from glacial Lake Great Falls and overlying sands. The glacial lake was formed when a lobe of the Laurentide ice sheet blocked the Missouri River east of Great Falls, Montana (cf. Hill 2000). Immediately downstream from Holter Lake, deposits of glacial Lake Great Falls exposed along the Missouri River and Little Prickly Pear Creek have been assigned to the Wisconsin (Schmidt 1972).

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