caldera

More Lava Under Yellowstone
More Lava Under Yellowstone
More Lava Under Yellowstone
Seismologists have discovered a reservoir of hot, partly molten rock hidden some 12-28 miles beneath Yellowstone National Park’s super-volcano. The magma could fill the 1000 cubic-mile-Grand Canyon more than 11 times. It last went off some 63 million years ago and is no closer to going off than before last week, but now we know we’re sitting on a keg of dynamite and not just a stick...