Rapid Grain Size Reduction in the Upper Mantle at a Plate Boundary

Steven B Kidder1, James Scott2, David John Prior3 and Emily Jean Lubicich1, (1)CUNY City College of New York, New York, NY, United States, (2)University of Otago, Dunedin, New Zealand, (3)University of Otago, Geology, Dunedin, New Zealand