I haven't LIUed this, but wasn't Lake Missoula a giant drain-off from the shield glaciers over Canada which covered most of the north-western US? I remember hearing or reading that the lake was held back by an ice plug, and when that gave the lake emptied in a matter of a few days, scouring the bedrock through Washington State up to 200 feet deep on its way to the sea.


The idiot also known as Capfka ...