Glacial Lake Ojibway

Glacial Lake Ojibway

Glacial Lake Ojibway

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Glacial Lake Ojibway was a prehistoric lake in what is now Northern Ontario and Quebec in Canada. Ojibway was the last of the great proglacial lakes of the last ice age. Comparable in size to Lake Agassiz (to which it was probably linked), and north of the Great Lakes, it was at its greatest extent c. 8,500 years BP.

Lake Ojibway was relatively short-lived. The lake drained in what must have been a catastrophic and dramatic manner around 8,200 years BP. One hypothesis is that a weakening ice dam separating it from Hudson Bay broke, as the lake was roughly above sea level. A comparable mechanism produced the Missoula floods that created the Channeled scablands of the Columbia River basin.

A recent analysis states it has not been conclusively determined whether the lake drained by a breach of the ice dam, by water spilling over the glacier, or by a flood under the glacier. It is also not conclusively known whether there were one or more pulses, and the route the water took to reach Hudson's Bay has not been determined.

The draining of Lake Ojibway was the most likely...
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