Glacial Lake Columbia was the lake formed on the ice-dammed Columbia River behind the Okanogan lobe of the Cordilleran Ice Sheet when the lobe covered 500 square miles (1,300 km 2) of the Waterville Plateau west of Grand Coulee in …

The Missoula floods (also known as the Spokane floods, the Bretz floods, or Bretz's floods) were cataclysmic glacial lake outburst floods that swept periodically across eastern Washington and down the Columbia River Gorge at the end of the last ice age.

2008年3月26日 · Beyond Spokane the flood poured into and overtopped another ice-jammed lake: Glacial Lake Columbia, created when a glacier diverted part of the upper Columbia River. Blocked from its normal riverbed, the river pushed south to begin carving the canyon known today as the Grand Coulee.

The Portland region owes its rich agriculture, beautiful geography, and many handsome erratics to a series of massive Ice Age Floods that burst from an ice dam, the last of them about 15,000 years ago with a few smaller Glacial Lake Columbia megaflood pulses finishing off around 14kya.

2020年4月22日 · The first floods mostly followed the big bend of Columbia valley looping through north-central Washington. But the south-advancing Okanogan ice lobe soon blocked that path, forming long-lasting glacial Lake Columbia in the impounded Columbia valley.

The ice-dammed Columbia River backed up to form Glacial Lake Columbia, a huge version of the lake now ponded by Grand Coulee Dam. Lake Columbia's overflow -- the diverted Columbia River -- occupied Grand Coulee between Ice Age Floods events.

Between 18,000 and 12,000 years ago, at the end of the last ice age, a series of glacial lake outburst floods blasted across the Columbia Basin. These floods were some of the largest ever seen in Earth’s history.

2023年4月4日 · On the Hanford Site, water completely covered Gable Mountain, eroding its slopes into the narrow, elongated shape seen today. Floodwaters also eroded the bluffs east of the Columbia, exposing distinctive white soil that gave name to the early town of White Bluffs. Could humans have witnessed these massive floods and lived to tell the tale?

The last floods from glacial Lake Missoula, Montana, probably ran into glacial Lake Columbia, in northeastern Washington.

But the south-advancing Okanogan ice lobe soon blocked that path, forming long-lasting glacial Lake Columbia in the impounded Columbia valley. Missoula floods into this lake were diverted south out of the Columbia valley and into eastern Washington coulees and scabland tracts.