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Did everywhere start out like a mountain?

from Cosmos

Every place on Earth once started as part of a mountain, scientists at Rice University in the U.S. are suggesting. Due to the unique ratio on the Earth's crust of two rare elements, niobium and tantalum, Ming Tang and his colleagues theorise that the Earth's crust was mostly formed in continental arcs, as mountains were pushed up by continental collisions. "If our conclusions are correct, every piece of land that we are now sitting on got its start someplace like the Andes or Tibet, with very mountainous surfaces," says Tang, lead author of a study published in Nature Communications. more

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