Lake Missoula was a prehistoric proglacial lake in western Montana that existed periodically at the end of the last ice age between 15,000 and 13,000 years ago. The lake measured about 7,770 square kilometres (3,000 sq mi) and contained about 2,100 cubic kilometres (500 cu mi) of water, half the volume of … See more Ice dam on the Clark Fork River The Cordilleran ice sheet originating in British Columbia expanded out of the mountains and southward. A tongue of ice pushed down the Purcell Valley or Purcell Trench, … See more Clark Fork Canyon This reach follows Montana Route 200 up the Clark Fork River canyon, 92 miles (148 km) to Paradise, then follows the Clark Fork, then 49 miles (79 km) through the Paradise-St. Regis Canyon along Montana Highway 135 See more • Missoula floods – Heavy floods of the last ice age • Glacial lake outburst flood – Type of outburst flood that occurs when the dam containing a glacial … See more • USGS Site on Glacial Lake Missoula • US Park Service Site for Glacial Lake Missoula National Natural Landmark • PBS's NOVA (TV series): Mystery of the Megaflood for … See more WebGiven the climate conditions of 20,000 years ago, precipitation and glacial meltwater from most of western Montana’s mountainous regions would have ended in Lake Missoula. At its largest extent, Lake Missoula’s depth exceeded 2,000 feet and may have held 600 cubic miles of water—as much as Lake Erie and Lake Ontario combined.

Megafloods of the Ice Age NOVA PBS

WebMay 1, 2001 · As the ice crossed, and eventually blocked the Clark Fork River, it became an ice dam. Behind this dam was formed one of the largest glacial lakes to have existed during the last ice age. Known as Glacial Lake Missoula, it covered an area over 2,900 square miles, and was nearly 2,000 feet deep at its deepest point by the ice dam. WebJan 4, 2024 · During the last Ice Age, a sheet of ice 20 miles wide got stuck in the Idaho panhandle and blocked the Clark Fork River, creating glacial Lake Missoula. At its highest, the water level reached ... great childrens story

Waning Pleistocene Ice Sheet – Ice Age Floods Institute

WebGlacial 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 ... Glacial Lake Missoula. The Cordilleran ice sheet also blocked the Clark Fork River and created Glacial Lake Missoula, rising behind a 2,000 feet ... WebApr 13, 2024 · During the last ice age, the Laurentide ice sheet reached the north side of the Highwood Mountains and formed a barrier to the Missouri River. Glacial Lake Great Falls was created upstream of this ice dam. ... "Many think of the landscapes created by the release of Glacial Lake Missoula, but the Shonkin Sag is another fantastic example of a ... WebThe Missoula floods (also known as the Spokane floods or the Bretz floods or Bretz's floods) were cataclysmic glacial lake outburst floods that swept periodically across … choral arts society racine