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New "Climate of the Past" paper about Oceanic Anoxic Event 3 in the Cretaceous.

The paper examines the spatial and temporal extent and the impact of the so-called Oceanic Anoxic Event 3, the last of the Cretaceous anoxic events when large parts of the oceans were free of oxygen and black shales were deposited (88.6–83.5 Ma, Coniacian-Santonian).

Based on the limited spatial extent and a missing clear signal in carbon isotopes Oceanic Anoxic Event 3 is interpreted as a regional low-latitude Atlantic event that influenced connected marginal seas like the Western Interior Basin and the Maracaibo Basin. During the same time interval, large parts of the rest of the world oceans experienced highly oxic sedimentation as evidenced by deep-water reddish sediments (CORBs-Cretaceous Oceanic Red Beds).

Plate reconstruction for 86 Ma with area of significant OAE 3 black shale sedimentation and deep-sea drilling sites.

 

Wagreich, M. (2012): "OAE 3" – regional Atlantic organic carbon burial during the Coniacian–Santonian. Climate of the Past, 8, 1447–1455, doi:10.5194/cp-8-1447-2012.

Link to the article: www.clim-past.net/8/1447/2012/cp-8-1447-2012.html

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