Chemical Oceanography Research - Sediment Geochemistry

Frances Eshom-Arzadon collects beach sediment

Chemical reactions in the ocean change dramatically and are facilitated by a unique set of microbes when the oxygen concentration is exhausted. The most widespread example of this is in ocean sediments which become the most important sink for nitrate after organic matter diagenesis depletes oxygen. Other examples are the oxygen minimum zones of the ocean and anoxic basins like the Black Sea. 

 

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