The "Great Unconformity" And Earth's Missing Billion...

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2026-02-28 10:00:13

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The "Great Unconformity" And Earth's Missing Billion Years May Have A New Explanation

In 1869, John Wesley Powell was studying layers of rock in the Grand Canyon when he noticed an unconformity in the layers. Around a billion years were missing, and the problem turned out to be global.

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