Bill Shedd examines a sample of authigenic carbonate collected at AT47. This rock is formed in the sediment through bacterial consumption of hydrocarbons.

Bill Shedd examines a sample of authigenic carbonate collected at AT47. This rock is formed in the sediment through the bacterial consumption of hydrocarbons. Image courtesy of Lophelia II 2009: Deepwater Coral Expedition: Reefs, Rigs and Wrecks.

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Lophelia II 2009

Lophelia II 2009: August 25

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