North America's 'broken heart': The billion-year-old...

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2025-05-16 13:00:07

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North America's 'broken heart': The billion-year-old scar from when the continent nearly ripped apart

The Midcontinent Rift is a giant tear that formed in what is now the U.S. Midwest 1.1 billion years ago. Nicknamed North America's "broken heart," it is filled with solidified magma and lava.

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