Professor Emeritus, University of California-Santa Barbara

Distinguished Visiting Professor, Rutgers University

Professor of Environmental Sciences, Emeritus

University of Colorado

Lamont-Doherty Earth Observatory of Columbia U.

Senior Scientist emeritus, Department of Paleobiology, National Museum of Natural History …

Professor of Marine Geology and Geophysics, Oregon State university

Professor and ARC Laureate Fellow, Australian National University

Professor of Geology, MARUM University of Bremen

Sorbonne University, Pierre et Marie Curie Campus, Paris and Smithsonian Institution …