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.
Scientists Are Studying Areas of Earth Where Time Is Mysteriously Missing
In mysterious rock formations known as "unconformities," millions of years of Earth's history are missing. Now, scientists have the best idea yet as to why.
Geologists Show Tasmania and the Grand Canyon Were Connected on Ancient Supercontinent
Rocks from Arizona’s Unkar Group and Tasmania’s Rocky Cape Group were likely part of the same formation 1.1 billion years ago on the supercontinent Rodinia.