Figures

Figure 3.9   Mean scores of the stratigraphic consistency index (SCI), the relative completeness index (RCI) and the gap excess ratio (GER) for fi ve geological time partitions of the data set of 1000 cladograms. Note that the SCI and GER indicate no change through time, while the RCI becomes worse (lower values) from the Paleozoic to Cenozoic but the RCI depends on total geological time, and so is not a good measure for this study. Pz, cladograms with origins solely in the Paleozoic; Pz/Mz, cladograms with origins spanning the Paleozoic and Mesozoic; Mz, cladograms with origins solely in the Mesozoic; Mz/Cz, cladograms with origins spanning the Mesozoic and Cenozoic; Cz, cladograms with origins solely in the Cenozoic. (Based on Benton et al. 2000.)

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