Missoula floods - Wikipedia
WEBThe 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.
The Cordilleran Ice Sheet and Missoula Floods - USGS
WEBGlacial Lake Missoula stretched eastward for some 200 miles and contained more water than Lake Erie and Lake Ontario combined. When the highest of these ice dams failed, lake water burst through, shooting out at a rate 10 times the …
Missoula Floods - ArcGIS StoryMaps
WEB1. Cordilleran ice dam. This story describes how the landscape of the Pacific Northwest and more specifically, the Johnson Creek basin in SE Portland, was formed. These historic floods originated from a glacial lake approximately 12,000-15,000 years ago.
The Missoula and Bonneville floods—A review of ice-age …
WEBApr 22, 2020 · The Channeled Scabland of eastern Washington State, USA, brought megafloods to the scientific forefront. A 30,000-km2 landscape of coulees and cataracts carved into the region’s loess-covered basalt attests to …
Ice Age Floods of Change - U.S. National Park Service
WEBAug 11, 2024 · At the end of the last Ice Age, 18,000 to 15,000 years ago, an ice dam in northern Idaho created Glacial Lake Missoula stretching 3,000 square miles around Missoula, Montana. The dam burst and released flood waters across Washington, down the Columbia River into Oregon before reaching the Pacific Ocean.
Washington’s Ice Age Floods – ESRI Story Map
WEBWith imagery, maps and video, this story map follows the devastating deluge of the Missoula floods as it tore across the landscape, from its origins in western Montana to its terminus at the Pacific Ocean.
GLACIAL LAKE MISSOULA - Home
WEBFlood Facts. The ice dam was over 2000 feet tall. Glacial Lake Missoula was as big as Lakes Erie and Ontario combined. The flood waters ran with the force equal to 60 Amazon Rivers. Car-sized boulders embedded in ice floated some 500 …
DOGAMI - IMS-36, Missoula Floods - Oregon
WEBWhen Lake Missoula waters breached an ice dam, some of the largest floods known on earth discharged nearly 350 million cubic feet per second—over 1,000 times the average discharge of the current Columbia River.
WEBIMS-36. INTERPRETIVE MAP SERIES. Missoula Floods — Inundation Extent and Primary Flood Features in the Portland Metropolitan Area, Clark, Cowlitz, and Skamania Counties, Washington, and Clackamas, Columbia, Marion, Multnomah, Washington, and Yamhill Counties, Oregon.
Washington's Ice Age Floods - Dan Coe Carto
WEBWith imagery, maps and animations, this narrative follows the devastating deluge of the Missoula floods as it tore across the landscape, from its origins in western Montana to its terminus at the Pacific Ocean.
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