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