Friday Field Photo #176: Oceanic Anoxic Event 2 (OAE2) in Deep-Sea Sediments
One of the drill sites from IODP Expedition 342 this past summer recovered sediments that spanned the Cenomanian-Turonian boundary (~93 Ma). This interval, known as Oceanic Anoxic Event 2 (OAE2), is well studied from numerous stratigraphic sections around the world and interpreted to record an event of very low to no oxygen in parts of the global ocean.
There was a lot of excitement as the cores that spanned this interval were being split. One of my colleagues from the core description team, Chris Junium of Syracuse University, has done quite a bit of research on this event and is pointing out the rather obvious bed of gray to black organic-rich shale within a succession of carbonate-rich pelagic oozes. The film maker we had on board was there to capture the excitement (check out the short movies he made from the expedition here).