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Earth's first example of recycling: its own crust! 
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Joined: Mon Aug 30, 2010 9:56 am
Posts: 12804
Post 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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Fri Mar 17, 2017 11:56 pm
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