A lost mega-cliff may explain the Grand Canyon’s missing billion years

a-lost-mega-cliff-may-explain-the-grand-canyon’s-missing-billion-years

A colossal cliff system created as the supercontinent Rodinia broke apart may have exposed the heart of the Grand Canyon nearly a billion years before the Colorado River carved it. The ancient landscape could also help explain why enormous sections of North America’s geological record appear to be missing.

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