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101 E. Seminary St.
Greencastle, IN, 46135-0037
(765) 658-4800

James Mills


Ernest R. Smith Professor of Geosciences


Geosciences, Geology, Earthquakes, Seismology, Volcanoes


James Mills' research specialty is the origin and evolution of silicic magmatic systems (igneous rocks, both volcanic and other). In recent years, he has conducted research on igneous rocks in southern Missouri. That area of Missouri features interesting geologic history, with igneous rocks approximately 1.4 billion years old. The region is probably a feeder system for getting magma to the earth's surface. Their research has also identified a small caldera from a volcano that used to exist in that area that was similar to what exists today in Yellowstone National Park.

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