Figure 1. Reconstruction of the North Central Atlantic at chron M0 showing a simplified bathymetry on each plate, outlines of the sedimentary basins (shaded regions), and their plate tectonic features (continuous lines) (fig. 2 of Srivastava and Verhoef, 1992). Also shown are the direction of plate motion (dashed lines) and the resulting overlap between plate boundaries (dark stippled regions). JB = Jeanne d'Arc Basin, WB = Whale Basin, HB = Horseshoe Basin, OB = Orphan Basin, FC = Flemish Cap, CSB = Celtic Sea Basin, WAB = Western Approaches Basin, PB = Porcupine Basin, GLB = Galicia Bank, IGB = Inner Galicia Basin, LB = Lusitanian Basin, CB = Cantabrian Basin, NNB = North Newfoundland Basin, SNB = South Newfoundland Basin, IAP = Iberia Abyssal Plain, TAP = Tagus Abyssal Plain. The Nazaré Canyon is to the northwest of the Lusitanian Basin.