Figure 1. Generalized, uncorrected heat-flow values, selected magnetic isochrons, and bathymetry from the northwestern Atlantic Ocean and adjacent regions of western Europe (after Louden et al., 1991). Letters (I = Ireland, W = Wales, C = Cornwall, B = Brittany, and S = Spain) and shaded areas denote general regions of Paleozoic basement adjacent to the Mesozoic margins (after Montadert et al., 1979). Inset shows location of Figure 2 and general location of Leg 149 sites. CM = Celtic Margin, AM = Amorican Margin, FZ = fracture zone.

Figure 1. Generalized, uncorrected heat-flow values, selected magnetic isochrons, and bathymetry from the northwestern Atlantic Ocean and adjacent regions of western Europe (after Louden et al., 1991). Letters (I = Ireland, W = Wales, C = Cornwall, B = Brittany, and S = Spain) and shaded areas denote general regions of Paleozoic basement adjacent to the Mesozoic margins (after Montadert et al., 1979). Inset shows location of Figure 2 and general location of Leg 149 sites. CM = Celtic Margin, AM = Amorican Margin, FZ = fracture zone.