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Judi Lynn

(160,211 posts)
Tue Apr 28, 2020, 04:32 AM Apr 2020

Researchers dig into case of geologic amnesia

APRIL 27, 2020

by Daniel Strain, University of Colorado at Boulder

A team of geologists led by the University of Colorado Boulder is digging into what may be Earth's most famous case of geologic amnesia.

Researchers have spotted that phenomenon, called the "Great Unconformity," at sites around North America, including in the Grand Canyon and at the base of Pikes Peak in Colorado. There lie sites of missing time, where relatively young rocks dating back about 550 million years sit right on top of much more ancient stone—in some cases more than 3 billion years old.

In other words, a huge chunk of geologic history has vanished from in between.

"Researchers have long seen this as a fundamental boundary in geologic history," said Rebecca Flowers, an associate professor in the Department of Geological Sciences.

More:
https://phys.org/news/2020-04-case-geologic-amnesia.html

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Researchers dig into case of geologic amnesia (Original Post) Judi Lynn Apr 2020 OP
good read! Thanks! lastlib Apr 2020 #1
missing time? Javaman Apr 2020 #2
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