Wirth's research utilizes geochemistry to study the origins of igneous rocks
and the evolution of continental and oceanic crust. He regularly leads students on field
excursions during the January intersession to Hawaii, Costa Rica, or the Galápagos
Islands, and he teaches Geologic Field Methods during summer. Recent research with
students has focused on rocks in the Bering Sea region, southern Ontario and northern
Minnesota, the Galápagos Islands, Tanzania, and Cozumel.
Wirth have been teaching at Macalester College since 1990.
EDUCATION: B.S., Beloit College; M.S., Ph.D., Cornell University
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