Cataclysms on the Columbia : A Layman's Guide to the Features Produced by the Catastrophic Bretz Floods in the Pacific Northwest

The formation of the Grand Coulee remained a mystery for many years, until J Harlen Bretz proved that the Columbia River basin was the site of huge floods 15,000 years ago that created the landscape we see today. This book in a culmination of John Eliot Allen's life-long interest in the Columbia River and the Columbia Plateau and has been derived from more than 100 sources in the technical literature, half of which discuss the origins and effects of the floods in Montana, Idaho and eastern Washington - acknowledgments For years the formation of the Grand Coulee remained a mystery until J Harlen Bretz set out to prove that the Columbia River basin was the site of huge floods 15,000 years ago that covered 16,000 square miles to depths of hundreds of feet & created the landscape we see today Why should anyone care for geology?