Dry Falls and Glacial Lake Missoula

July 15, 2008

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Provided and Copyright by: Bruce Bjornstad
Summary Author and Editor: Bruce Bjornstad

Giant longitudinal grooves and potholes scar the landscape above Dry Falls, Washington, a huge recessional cataract canyon eroded by Ice Age floods from Glacial Lake Missoula. Today's landscape is much as it appeared after the last flood about 13,000 years ago. Water going over the lip of the falls was miles wide, 300 ft (91m) deep, and moving up to 70 mph (112 km/h). Photo taken near Grand Coulee, Washington in May of 2007.

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