When Did the Southeastern Laurentide Ice Margin Really Retreat at the Close of the LGM?

Dorothy M Peteet, NASA Goddard Institute for Space Studies, New York, United States; Lamont -Doherty Earth Observatory, Palisades, United States and Dennis V Kent, Rutgers University New Brunswick, EPS, New Brunswick, NJ, United States; Lamont-Doherty Earth Observatory, Columbia University, Palisades, United States