Download PDF by John Eliot Allen: Cataclysms on the Columbia: a layman's guide to the features

By John Eliot Allen

ISBN-10: 0881922153

ISBN-13: 9780881922158

The formation of the Grand Coulee remained a secret for a few years, until eventually J Harlen Bretz proved that the Columbia River basin was once the location of big floods 15,000 years in the past that created the panorama we see this present day.

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Additional info for Cataclysms on the Columbia: a layman's guide to the features produced by the catastrophic Bretz floods in the Pacific Northwest

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Here the floods were more than 900 feet deep, overtopping and scouring off the plateaus in the foreground, and rising well above the cliffs across the river. Photograph copyright James O. Holloway. Front inside cover illustration: View of the Channeled Scablands region, about 13,225 square miles in area, taken on August 31, 1972, by the first NASA Earth Resources Technology Satellite [(ERTS-1) now called Landsat] from an altitude of 569 miles. The dark "braided" pattern depicts the channelways of the Great Spokane Floodsthe areas where vigorous stream erosion stripped away the "frosting" of loess to expose underlying dark basalt.

We joke about rocks. A few years back pet rocks were in vogue: "easy on the furniture, non-shedding, guaranteed housebroken, may be fed on milk (it comes in quartz)" and so on. And this joking is understandable. Rocks as symbols of affection are amusing; and the prototype of the rock-lover, the rock hound, iswell, let's admit itfaintly comical. But perhaps we're being unfair. Rock hounds are only the hangers-on, the groupies to the profession. What about the trained geologist? What about the degreed and practiced geological specialist?

Vindication 69 Part III Setting the Stage Chapter 12. Geology, Life and the Floods 77 Geological Foundations of the Northwest 77 The Ice Age 79 The Pre-Flood Landscape 81 Early Humans in North America 82 Life before the Floods 86 The Floods 87 Chapter 13. Introduction to Cataclysms 90 Chapter 14. After the Bretz Floods 95 The Landscape 95 The Life 96 Criteria for the Recognition of Past Great Floods 97 Erosional Features 98 Depositional Features 98 Page vi Part IV Following the Floods from Source to Sea Chapter 15.

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Cataclysms on the Columbia: a layman's guide to the features produced by the catastrophic Bretz floods in the Pacific Northwest by John Eliot Allen


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