Radiolaria and Global Oceanic Anoxic Event-2 in the Upper Cretaceous sections of Western Caucasus
Journal: EGU General Assembly Conference Abstracts
Year: 2010

The Tethyan Upper Cretaceous deposits rich in organic carbon are currently regarded as indications of anoxic condition. Such sediments (predominantly black bituminous shales) are common in the Cenomanian-Turonian boundary and reflect worldwide episode of anomalous environmental conditions that has been called “Global Oceanic Anoxic Event 2” (OAE-2) (Schlanger et al., 1987). Various groups of marine organisms were influenced by this event and displayed different changes related with oxygen-poor e