Megan Eve Newcombe, University of Maryland, Department of Geology, College Park, MD, United States, Terry A Plank, Lamont Doherty Earth Obs., Palisades, NY, United States, Youxue Zhang, Univ of Mich- Earth & Env Sci, Ann Arbor, MI, United States, Alexander S Lloyd, Lamont -Doherty Earth Observatory, Palisades, NY, United States, David Ferguson, University of Leeds, School of Earth and Environment, Leeds, United Kingdom and Anna Barth, Columbia University, NYC, NY, United States