Figure F9. Mid-Cretaceous record of black shales and oceanic anoxic events (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), LIP emplacement (Larson, 1991a), plankton evolution (Erbacher and Thurow, 1997; R.M. Leckie, et al., unpubl. data), and platform drowning (R.M. Leckie, et al., unpubl. data).