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Seen from above hope, Lake Pend Oreille was once an ice dam that held back Glacial Lake Missoula (Jim Mellen). Read more in On the Trail of the Ice Age Floods, Vol. 2.
lake Pend Oreille
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ake Pend Oreille is a remnant from the last Ice Age when outburst floods associated with periods of glaciation crept south across the northern border of the United States. The glacial ice blocked river drainages, including the Clark SPTChamberAD2-HIGH.pdf 1 1/19/11 Fork near the Idaho-Montana border. These 11:03 blockages created huge, ice-dammed lakes. The largest of these was Glacial Lake Missoula. Geologists theorize that about every several
dozen years the impoundment disintegrated and the entire ice dam suddenly let loose, releasing an earth-shaking glacial-outburst flood. The largest floods consisted of up to 530 cubic miles of bashing, roaring water that raced through Idaho, AM across eastern Washington and down the Columbia River valley all the way to the Pacific Ocean. Most of the floodwaters burst out of the intermontane valley that today holds Lake Pend
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