This was the first area hit by floods coming from Glacial Lake Missoula, which lay just beyond the center right of this image, up the Clark Fork River.

1. Blackfoot River Valley When Glacial Lake Missoula's ice dam shattered, a northern arm of the lake drained in a matter of hours through a narrow gap in Montana's Blackfoot River valley.

And the Missoula Floods occurred repeatedly over the course of about 2,500 years, as new glacial ice dams plugged the river outlet, Glacial Lake Missoula refilled with water, and the dam then ...

2004-09-05 04:00:00 PDT Hope , Idaho-- Thousands of years ago, with a force that shook the Earth, ice dams in the mountains here gave way, sending a towering, churning wall of water -- the ...

Glacial Lake Missoula formed behind a miles-long dam of ice across what is now the valley of the Clark Fork and Pend Oreille rivers running from Montana to northeast Washington.

Each draining of glacial Lake Missoula could have taken with it evidence of earlier floods. Where all the water went Just as Chambers was working on his lake sediments, a paper by J. Harlen Bretz ...

Known as the 'Great Spokane Flood,' the Bretz Floods, or the Glacial Lake Missoula Floods, these floodwaters originated in a huge, deep lake that inundated much of Western Montana." ...

Scientists also believe that the Missoula Floods occurred repeatedly over the course of about 2,500 years, as new glacial ice dams plugged the river outlet, Glacial Lake Missoula refilled with ...

While glacial lake outburst floods can be catastrophic in populated areas like the Himalayas, ... Lake Missoula had an outburst that was 2,500 times larger than the recent Catalina event.

LAKE COMO – It’s hard to imagine now. A huge lake formed behind a 2,000-foot-high, 35-mile-wide ice dam that blocked the Clark Fork River near the Montana and Idaho border. Glacial Lake ...