Named in honor of Dieter Stöffler, professor and director of the Institute for Planetology, University of Münster, Germany. He is especially well known for his careful and elegant calibration of the temperatures and peak shock pressures associated with different grades of shock metamorphism. At the Ries {see planet  (4327)} impact crater in Germany, he solved these relationships chiefly from quantitative study of shock-formed phases of silica. He has worked extensively on the origin of the regolith, impact breccias, and magnetic history of the Moon, and on the petrology of meteorites. (M 18140) _ _.