: a typically large body of intrusive igneous rock
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Called a pluton by geologists, the Barre granite formation is calculated to be four miles long, two miles wide and 10 miles deep.—Walter Nicklin, Washington Post, 16 June 2022 In Nevada, for instance, geologists find fibers associated with jagged landscape formed by plutons, which are huge rock formations caused by liquid magma forced upward into the cooler crust and then solidifying.—Deborah Blum, WIRED, 17 Jan. 2014
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