The glacier, a southern tongue of the great Cordilleran ice sheet that ... arrived inside icebergs caught in a Glacial Lake Missoula flood. When the bergs grounded and melted here, the rocks ...
Some of the largest floods in earth history drained through the Columbia River during Pleistocene glacial periods (Baker, 2009). These events are known as the Missoula Floods or the Scabland Floods.
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