At first glance, New England doesn’t seem like a hotbed of geologic activity. The region doesn’t have any rumbling volcanoes. Earthquakes are almost unheard of. And its mountains are mere hills compared to ranges like the Rockies or the Sierra Nevada in the western U.S. But don’t underestimate what’s going on beneath the surface: It turns out this idyllic pocket of the northeastern U.S. may sit atop a rising mass of warm rock—a smaller, slower version of the magma pockets under well-known volcanic zones.
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