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by d5kenn on July 31st, 2003

d5kenn

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What is the oldest known age of oceanic basalt?

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  • by d5kenn on July 31st, 2003

    d5kenn

    Roughly 200-300MY. Basalt, which is denser than continental granite, sinks into the mantle at oceanic abysses and is formed anew at mid-oceanic ridges. Granite floats atop the basalt and is not reabsorbed into the earth -- and as a result, is much older on average.

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    • Man, i was really curious about that, too

      AB-Joel

      by AB-Joel on July 31st, 2003

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