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Study Suggests Earth's Mantle Influenced the Great Unconformity

A study suggests that the Great Unconformity in the Grand Canyon, a significant gap in the geological record, may have been influenced by processes in Earth's mantle. Researchers propose that slow currents of hot rock pushed continents up, allowing glaciers to erode them and fresh sediments to cover the area.

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Nicolas Flament Santosh Dhungana

Researchers have proposed that the Great Unconformity in the Grand Canyon, a geological gap marking a significant period in Earth's history, may have been shaped by processes in the Earth's mantle. According to a study published in Nature, slow currents of hot rock pushed continents upward, allowing glaciers to erode them and fresh sediments to cover the area. The oldest sediments above this gap in North America date back between 635 and 482 million years.

Key facts

  • The Great Unconformity represents a gap in the geological record.
  • The gap can range from 200 million to over a billion years.
  • The oldest sediments above the Great Unconformity are 635 to 482 million years old.
  • The study was conducted by Nicolas Flament and Santosh Dhungana.
  • The feature has been traced across North America, northern Europe, and northern China.
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Original Headline

Earth's churning mantle may have created the Great Unconformity

Neutral Headline

Study Suggests Earth's Mantle Influenced the Great Unconformity