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Sulfur geochemistry of organic-rich sediments from Mud Lake, Florida, USA

January 1, 1995

The cores include the upper 4 m of sediment, which consist of four major horizons based on petrographic analyses of the organic material. Systematic changes in the isotopic composition of sedimentary disulfide and organic sulfur coincide with variations in the sulfur species and vegetation types. The transition to sapropel is accompanied by a large negative shift in disulfide ??34S- values, consistent with an increase in sulfate availability and a slower rate of sulfate reduction. -from Authors