Donald M. FisherDonald M. Fisher is a structural geologist and professor at Pennsylvania State University, where he leads a Structural Geology and Tectonics research group. His research on active structures, strain histories and deformation along convergent plate bondaries has taken him to field areas in Central America, Kodiak Alaska, northern Japan, Taiwan and offshore Sumatra. He has been teaching structural geology to undergraduate and graduate students for more than 20 years. Read More Read Less