Forming lower continental crust via imbrication: Density filtering of underthrust material at the Moho in arcs and continental collision zones

Mark D Behn, Boston College, Chestnut Hill, MA, United States, Peter B Kelemen, Lamont Doherty Earth Observatory, Columbia University, Palisades, NY, United States and Bradley Hacker, Univ Bern, Institute of Geological Sciences, Bern, Switzerland