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The Camas Prairie Basin filled when Lake Missoula reached 2,770 feet (840 m) asl. As the water in the Lake Missoula Basin rose, this basin gained a second outlet through Rainbow Lake at 3,588 feet (1,094 m) asl; Willis Gulch 3,349 feet (1,021 m) asl; Markle Pass 3,352 feet (1,022 m) asl; and Big Gulch 3,435 feet (1,047 m) asl.
They based the Glacial Lake Missoula discharge rate on the rate predicted for the Spokane Valley–Rathdrum Prairie immediately downstream of Glacial Lake Missoula, for which several previous estimates had placed the maximum discharge of 17 × 10 6 m 3 /s and the total amount of water discharged equal to the maximum estimated volume of Lake ...
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 ...
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]
Shaw's team reviewed the sedimentary sequences of the Touchet beds and concluded that the sequences do not automatically imply multiple floods separated by decades or centuries. Rather, they proposed that sedimentation in the Glacial Lake Missoula basin was the result of jökulhlaups draining into Lake Missoula from British Columbia to the north.
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.
J. T. Pardee first suggested in 1925 to Bretz that the draining of a glacial lake could account for flows of the magnitude needed. Pardee continued his research over the next 30 years, collecting and analyzing evidence that eventually identified Lake Missoula as the source of the floods (now the Missoula floods) and creator of the Channeled ...
Glacial Lake Ottawa in Illinois on the upper Illinois River. [18] Glacial Lake Pontiac in Illinois on the lower Vermillion River. [18] Glacial Lake Wauponsee in Illinois at the headwaters of the Illinois River. [18] Lake Watseka in Illinois on the Iroquois River. [18] Ohio River basin Lake Monongahela, along the Allegheny, Monongahela and upper ...