Lisa A Gilbert¹, Ellen A R Iverson², Kim A Kastens³ and Cathryn Allen Manduca², (1)Williams College and Williams-Mystic, Geosciences and Marine Science, Mystic, CT, United States, (2)Carleton College, SERC, Northfield, MN, United States, (3)Columbia University, Lamont-Doherty Earth Observatory, Palisades, NY, United States