Are Deep Seismic Reflections at Volcanic Margins from the Petrological Moho or from within the Mantle?

Nicholas J Kusznir1, Caroline Jayne Harkin1, Alan M Roberts2, Paul Bellingham3 and Gianreto Manatschal4, (1)University of Liverpool, Liverpool, L69, United Kingdom, (2)Badley Geoscience, Spilsby, United Kingdom, (3)ION Geophysical, Chertsey, Surrey, United Kingdom, (4)IPG, Strasbourg, France