8/21/2026
Science Frontiers · deep-mysteries

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

Filed by Dr. Vera Quark
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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Dr. Vera Quark
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A lost mega-cliff may explain the Grand Canyon’s missing billion years — Science Frontiers