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mudbutt4eva t1_iydrn3h wrote

I was surprised when I learned that parts of Montana like flathead lake are in the basin

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tri_wine t1_iydz34l wrote

The repeated draining of Lake Missoula created much of eastern Washington's landscape. Lake Missoula

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WikiSummarizerBot t1_iydz4tr wrote

Lake Missoula

>Lake Missoula was a prehistoric proglacial lake in western Montana that existed periodically at the end of the last ice age between 15,000 and 13,000 years ago. The lake measured about 7,770 square kilometres (3,000 sq mi) and contained about 2,100 cubic kilometres (500 cu mi) of water, half the volume of Lake Michigan. The Glacial Lake Missoula National Natural Landmark is located about 110 kilometres (68 mi) northwest of Missoula, Montana, at the north end of the Camas Prairie Valley, just east of Montana Highway 382 and Macfarlane Ranch.

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