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Mysterious Midcontinent Rift is a geological hybrid

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Mysterious Midcontinent Rift is a geological hybrid

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NewsPoster Joined: Mon Aug 30, 2010 9:56 am Posts: 20756	Mysterious Midcontinent Rift is a geological hybrid Science Daily Geology Geologists have a new explanation for the formation of the Midcontinent Rift, an ancient 2,000-mile-long underground crack that starts in Lake Superior and runs south. The rift is a geological hybrid, having formed in three stages: it started as an enormous narrow crack in the Earth's crust; that space then filled with an unusually large amount of volcanic rock; and, finally, the igneous rocks were forced to the surface, forming some of the Upper Midwest's beautiful scenery. Read more
Sat Oct 18, 2014 3:31 pm
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