Figure 173-1. Bathymetric chart of the west Iberia margin; contours at 200, 500, 1000 m etc. Existing DSDP/ODP sites are shown by black dots. Sites proposed here are shown by black triangles. Inset is expanded plot of the boxed area at 40°40'N showing old (circles) and proposed (triangles) drill sites and tracks of seismic reflection profiles used to create the composite cross-section in Fig. 2.