The oldest earth minerals to date are the Jack Hills zircons, from Australia. Detrital zircons with ages >4000 Ma have been found in these rocks and a 4,404 +/- 8 Myr zircon was found at Eranondoo Hill (Wilde et al., 2001), the oldest dated material on Earth. The acasta tonalite from Canada and the Barberton greenstone from South Africa are very old, too.
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