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Astrobiology Magazine

Meteorite bombardment likely to have created the Earth’s oldest rocks

14 Aug 2018, 21:00 UTC
Meteorite bombardment likely to have created the Earth’s oldest rocks
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Scientists have found that 4.02 billion year old silica-rich felsic rocks from the Acasta River, Canada - the oldest rock formation known on Earth - probably formed at high temperatures and at a surprisingly shallow depth of the planet's nascent crust.

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