Figure 1. The changing plate tectonic setting of Iberia. A-F: Plate tectonic setting between Chron M10 (Hauterivian) and Chron 6 (Burdigalian), after Srivastava et al., 1990a (with permission). AGFZ = Azores-Gibraltar Fracture Zone; KA = Kings Trough-Azores Biscay Rise-North Spanish Trough-plate boundary. Shaded areas represent regions of overlaps between plates, implying later extension in those regions. The regions with gaps between plates imply later compression. G. Present-day plate tectonic setting, after Klitgord and Shouten (1986). Dotted lines denote present-day 200-m isobath (edge of the continental shelf). Lines with small perpendicular dashes denote the approximate continental edge. Large arrow indicates plate motions relative to North America (after Klitgord and Shouten [1986], with slight modifications off Iberia).