University of Michigan, Department of Geol.Sciences, 1100 N-Univ.Ave., Ann Arbor, MI 48109, United States ; Potsdam University, Inst. f. Geowissenschaften, Karl-Liebknecht-Str. 25, Potsdam-Golm, 14476, Germany
University of Michigan, Department of Geol.Sciences, 1100 N-Univ.Ave., Ann Arbor, MI 48109, United States
Stanford University, Department of Geol. & Environm. Sci., Stanford, Stanford, CA 94305,
Potsdam University, Inst. f. Geowissenschaften, Karl-Liebknecht-Str. 25, Potsdam-Golm, 14476, Germany