Great Unconformity
A Billion Years of Time Are Mysteriously Missing. Scientists Think They Know Why.
The Great Unconformity has baffled geologists for a century. New research points to glaciers being the culprit.
Why One Billion Years of Time Are Missing in the Grand Canyon
The Great Unconformity, a bizarre gap in the geological record, may be linked to the breakup of an ancient supercontinent.
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