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216 pages, Paperback
First published June 1, 1986
it is now generally agreed that between 15,000 and 18,000 years ago around 40 to 90 tremendous deluges of almost inconceivable force and dimension swept across large parts of the columbia river drainage. swollen by the floodwaters, the columbia grew to contain 10 times the flow of all the rivers in the world today and 60 times the flow of the amazon river. nearly 16,000 square miles were inundated to depths of hundreds of feet, the greatest documented floods known to have occurred in north america.cataclysms on the columbia, written by john eliot allen, marjorie burns & scott burns, is a relentlessly fascinating account of the missoula floods — and geologist j harlen bretz, whose ideas proposing large-scale flooding to explain the eastern washington landscape were widely ridiculed by colleagues (until proven correct decades later). these ice age floods, almost unfathomable in scope, radically altered the geology of the pacific northwest. cataclysms offers a thorough history of the floods themselves and also detailed descriptions of their effects across localized areas spanning four states (montana, idaho, washington, oregon). with plenty of explanatory photographs, maps, and charts, the book is essential for understanding the region's geologic history.