Causes of oxic–anoxic changes in Cretaceous marine environments and their implications for Earth systems—An introduction

This special issue originated from a session at the 33th International Geological Congress, Oslo, Norway, in August 2008: Causes of oxic-anoxic changes in Cretaceous marine and non-marine environments and their implications for Earth systems (IGCP 463 and 555), convened by Chengshan Wang, Michael Wagreich, and Bradley Sageman. The session aimed at bringing together contributions that shed light on the anoxic to oxic changes in the world oceans during the Cretaceous, including discussion on consequences for today's global change.