Oregon Public Broadcasting,
Newman, Jim.
Oregon Public Broadcasting.
Oregon field guide ; #1001
Spectacular floods changed the landscape of Oregon and Washington some 17,000 years ago, when Ice Age glacial dams near Missoula, Montana broke apart and unleashed an inland sea. The powerful flood -- what geologists believe was the greatest moving body of water in the earth's history -- tore open the landscape of eastern Washington, merged with the Columbia River and left what is now Portland, Oregon, under 400 feet of water. The floods carried fertil eastern Washington soil 600 miles to Oregon's Willamette Valley, forming the base for the thriving agriculture in the valley today.
Portland, Or. : Oregon Public Broadcasting, [1999]
Ice Age flood [videorecording] : catastrophic transformation of the West
Ice Age flood catastrophic transformation of the West
Ice Age flood catastrophic transformation of the West
Catastrophic transformation of the West
Missoula flood
Oregon field guide ;
Oregon field guide (Television program)