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Search - Cataclysms on the Columbia (Scenic Trips to the)
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Cataclysms on the Columbia - Scenic Trips to the Author: 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.
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Genres:
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- Science & Math >> Earth Sciences >> Rivers
- Professional & Technical >> Professional Science >> Earth Sciences >> Geology