Figure 6. Plate reconstruction showing the North Atlantic region at the time of continental breakup between Greenland and Europe at magnetochron C24n (~53 Ma). Points A and B indicate the postulated paleo-positions of the ancestral Iceland mantle plume at the time of breakup (from Duncan and Richards, 1991; Lawver and Müller, 1994; Brooks, 1973; White and McKenzie, 1989, respectively). SDRS = seaward-dipping reflector sequence, JMFZ = Jan Mayen Fracture Zone, and GSFZ = Greenland Svalbard Fracture Zone (modified from Tegner et al., 1998a).