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The Glacial Lake Missoula National Natural Landmark is located about 110 kilometers (68 mi) ... Average height between 13 and 30 feet (4.0 and 9.1 m).
After the lake drained, the ice would reform, creating Glacial Lake Missoula again. These floods have been researched since the 1920s. During the last deglaciation that followed the end of the Last Glacial Maximum , geologists estimate that a cycle of flooding and reformation of the lake lasted an average of 55 years and that the floods ...
Glacial Lake Missoula. Between 15,000 and 13,000 years ago, Glacial Lake Missoula formed when an ice sheet blocked the Clark Fork River, damming up the river's water back into the valleys of western Montana. [5] The dam would periodically burst causing a flood of water to rush across Idaho, Washington and Oregon to the Pacific Ocean.
Giant current ripples are an important feature of the Channeled Scablands in Washington state, U.S., which formed during the Last Glacial Maximum as a result of at least 39 glacial lake bursts, called the Missoula floods, which originated from glacial lakes Columbia in Washington and Missoula in Montana. [10] [11] [12] [13]
The areas inundated in the Columbia and Missoula floods are shown in red. The Ice Age Floods National Geologic Trail is a network of routes connecting natural sites and facilities that provide interpretation of the geological consequences of the Glacial Lake Missoula floods of the last glacial period that occurred about 18,000 to 15,000 years ...
The 500 cubic miles (2,100 km 3) of water in Lake Missoula was released in just 48 hours—a torrential flood equivalent to ten times the combined flow of all the rivers in the world. This mass of water and ice, 2,000 feet (610 m) high near the ice dam before release, flowed across the Columbia Basin, moving at speeds of up to 65 miles per hour ...
Erratic Rock State Natural Site is a state park in the Willamette Valley of Oregon, United States.Featuring a 40-short-ton (36 t) glacial erratic from the Missoula Floods, the small park sits atop a foothill of the Northern Oregon Coast Range in Yamhill County between Sheridan and McMinnville off Oregon Route 18.
Lake Columbia's overflow – the diverted Columbia River – drained first through Moses Coulee and as the ice dam grew, later through the Grand Coulee. Eventually, water in Lake Missoula rose high enough to float the ice dam until it gave way, and a portion of this cataclysmic flood spilled into Glacial Lake Columbia, and then down the Grand ...