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Geology Fun Fact - The Oldest Rock on Earth

Geology Fun Facts
What is the Age of the Oldest Rock on Earth? 
The oldest rock on Earth is a granite protolith that has been dated to 4.03 Ga (billion years). There are reports of a possibly older rock (a faux-amphibolite) dated up to 4.28 Ga, but there is some controversy about those rocks. Both of these rocks have been found in northern Canada.

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