Original news saved on 2 July 2009, 14:30 GMT from Science Daily. More below:
Magmatic Plumbing Of A Large Permian Caldera Exposed To A Depth Of 25 Kilometers Large volcanic calderas, aka supervolcanoes, are enormous craters tens of kilometers in diameter produced by giant, explosive eruptions that rank among the most violent geologic events. Geophysical studies of recently active calderas and investigations of their eruption products suggest that their magmatic systems are driven by intrusion of mantle-derived basalt in the deep crust, a process commonly referred to as magmatic underplating.
