William L. GriffinWilliam L. Griffin is an Honorary Professor of geology at Macquarie University in Sydney, Australia. Dr. Griffin’s research interests include the petrology and geochemistry of the deep crust and lithospheric mantle, the geochemical and dynamic evoluton of the crust-mantle system, and magma generation and metasomatism in the crust and mantle. He received his PhD from the University of Minnesota. Read More Read Less