Word: batholith
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Dates: during 1947-1947
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...geologists know little about the underground conditions responsible for Paricutin. It lies in the "Michoacan volcanic province," dotted with old, dead craters. The whole region may be resting on a "batholith," an enormous mass of "magma" or hot, plastic rock. More likely, Paricutin gets its lava from a smaller "local chamber" of molten basalt which gnawed its way toward the surface until it finally broke through. If the underground lava supply is large enough and active enough, Paricutin may grow as tall as 17,876-ft. Popocatepetl, 200 miles to the east...
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