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Figure 7. Mid-Cretaceous record of black shales and OAEs in the context of the carbon isotopic record (Erbacher et al., 1996; Bralower et al., 1999), changing global sea level (Haq et al., 1988), seawater ⁸⁷Sr/⁸⁶Sr (Bralower et al., 1997a), large igneous province emplacement (Larson, 1991), plankton evolutionary events (Erbacher and Thurow, 1997; Leckie et al., unpubl. data), and carbonate platform drowning (Leckie et al., unpubl. data). The black section of the LIP indicates time periods when most of the volcanic activity took place based on exisiting ages. The dotted section indicates time periods when activity is possible, but no ages have been found.

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