A specimen of a Witwatersrand diamond. Credit: Wits University
The 3 diamonds extracted from 3B-yr-old Witwatersrand Supergroup – the rock formation that is host to the famous Johannesburg gold mines to study when modern-style plate tectonics began to operate on planet Earth. “Because diamonds are some of the the hardest, most robust material on Earth, they are perfect little time capsules and have the capacity to tell us what processes were occurring extremely early in Earth’s history,” says Dr Katie Smart.
A cluster of the Witwatersrand diamonds. Credit: Wits University
The Earth is ~4...
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