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Record of Early Cretaceous Oceanic Anoxic Events in Adriatic Platform, Croatia

The long (700m) Hauterivian to Albian Adriatic Platform section mainly from Mljet Island, Croatia underwent little post-Mesozoic burial or little later diagene-sis, consequently its smoothed δ13C and δ18O record from precursor calcite lime mudstone matrix provides one of the most continuous stable-isotope curves from an Early Cretaceous platform. This record captures the carbon isotope excursions (CIEs) and oceanic anoxic events (OAE1a, b, c) evident in published hemipelagic sections, with the added advantage of preserving a record of associated relative sea level changes. The platform facies appear to have been little affected by the OAEs, except for OAE1a when deposition of organic-rich laminated limestones occurred in local downwarps.

Oceanic anoxic event ; Carbon isotope excursion ; Carbonate diagenesis ; Early cretaceous ; Adriatic platform

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