Chronologies of sedimentary processes in sediments of the FOAM site, Long Island Sound, Connecticut

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ID: 299896
1984
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Abstract
Distribution with depth of: ^234^ Th ~xs~ , ^7^ Be, ^210^ Pb ~xs~ , (super 239,240) Pu, selected trace elements, ^14^ C (in both shells and organic fraction), pore water sulfate, and the diagenetic reaction products, solid phase organic carbon and sulfur. The ^234^ Th ~xs~ and ^7^ Be data indicate that the upper 4 cm are well mixed on the time scale of about a year. The distributions of ^210^ Pb ~xs~ , (super 239,240) Pu, and anthropogenic trace metal excesses in the (4-15) cm section are controlled by the mixing of the surface (0-4) cm sediment into this layer. The net sediment accumulation rate in the (0-15) cm layer is about 0.03 cm/yr. The average sediment accumulation rate in the ( approximately 18-100) cm layer, as determined from ^14^ C ages of shell layers, is 0.094 + or - 0.021 cm/yr, perhaps a factor of approximately 2 lower than that estimated from diagenetic modeling of solid phase sulfur and organic carbon depth profiles.\--Modified journal abstract.
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Authors S. Krishnaswami, Marc C. Monaghan, Joseph T. Westrich, J.T. Bennett, Karl K. Turekian
Journal american journal of science
Year 1984
DOI
10.2475/ajs.284.6.706
URL
https://ajs.scholasticahq.com/article/60311.pdf
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