World's Oldest Rocks?

Earth's most ancient rocks, with an age of 4.28 billion years, have been found on the shore of Hudson Bay, Canada.
posted by Bobs on Sunday, September 28, 2008 - link to this photo
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1 Comment
Mon, September 29, 2008 - 8:58 PM
Looks like a xenolith inside something else. What's the original and later rock?

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