Figure 5From: Evolutionary process of Beppu Bay in central Kyushu, Japan: a quantitative study of the basin-forming process controlled by plate convergence modesIsochron contour map of the lower horizon (purple; top of acoustic basement). For contour maps, interpretation based on supplementary data (e.g., gravity anomalies, shallow seismic information) is shown by dashed lines. Solid contours were deduced from the present dataset. Thick black lines represent faults.Back to article page