Geologist points to the edge of a boulder of reddish volcanic rock from the fossilized supervolcano in Sesia Valley, Italy. The volcanic rock is encased by a light-gray tuff, a relationship characteristic of deposits produced during caldera-forming, explosive eruptions. Credit: Silvano Sinigoi, Universita di TriesteFrom Live Science:
The fossilized remains of a supervolcano that erupted some 280 million years ago in the Italian Alps are giving geologists a first-time glimpse at the deep "plumbing system" that brings molten rock from far underground to the Earth's surface.
James E. Quick of Southern Methodist University in Texas and his team discovered the "fossil," or extinct, supervolcano in the Alps' Sesia Valley two years ago, but they are just now reporting the results after careful study.
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