The Northern Gulf of Mexico During OAE2 and the Relationship Between Water Depth and Black Shale Development


"Despite their name, Oceanic Anoxic Events (OAEs) are not periods of uniform anoxia and black shale deposition in ancient oceans. Shelf environments account for the majority of productivity and organic carbon burial in the modern ocean, and this was likely true in the Cretaceous as well. However, it is unlikely that the mechanisms for such an increase were uniform across all shelf environments. Some, like the northwest margin of Africa, were characterized by strong upwelling, but what might drive enhanced productivity on shelves not geographically suited for upwelling? [...]"

Source: Plaeoceanography
Authors: Christopher M. Lowery
DOI: 10.1002/2017PA003180

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