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Earth's first example of recycling: its own crust!
http://www.epgeology.com/news-f37/earth-first-example-recycling-its-own-crust-t15057.html
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Author:  NewsPoster [ Fri Mar 17, 2017 11:56 pm ]
Post subject:  Earth's first example of recycling: its own crust!

Science Daily Geology

Rock samples from northeastern Canada retain chemical signals that help explain what Earth's crust was like more than 4 billion years ago.

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