Abstract

AbstractThe various extinctions of marine taxa in the Late Cenomanian can be shown as conforming to the ‘step‐wise extinction’ model. The order of such extinctions is, however, compatible with the presence of an expanded oxygen minimum zone in the world ocean. The occurrence of iridium anomalies at this level in the succession may, however, indicate a volcanogenic control on the global environment. Detailed time‐analysis of the Late Cenomanian event has been used to produce a correlation of some key successions.

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