Figure 6 Econ Geol '96 Figure 6. Plot indicating the Ca:Mn for each of the literature Paleozoic shales [Penn = Pennsylvanian samples (Coveney et al., 1987)] and Cenozoic sediments and shales [SF = San Francisco Bay (analyzed this study); Black Sea (Hirst, 1974); Monterey = Monterey Oil Shale (analyzed this study)].
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Calcium in ppm
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