The United States’ oldest known rock has existed for at least 3.6 billion years

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A stone statement successful Michigan has hit retired different contenders for nan title — for now

Photo of watersmeet Gneiss stone that could beryllium nan oldest known successful nan United States

An study of minerals successful nan Watersmeet Gneiss (shown) propose nan metamorphic stone dates to astir 3.6 cardinal years ago, perchance making it nan oldest known stone successful nan United States.

Paul Brandes

A weathered motion successful nan Minnesota River Valley proudly proclaims: “World’s Oldest Rock.”

Source sciencenews
sciencenews