Growth rates of manganese nodules in Oneida Lake,New York |
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| Authors: | Willard S Moore Walter E Dean S Krishnaswami DV Borole |
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| Institution: | Department of Geology, University of South Carolina, Columbia, SC 29208 U.S.A.;U.S. Geological Survey, Denver, CO 80225 U.S.A.;Physical Research Laboratory, Ahmedabad India |
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| Abstract: | 226Ra is used to document the growth histories of six manganese nodules from Oneida Lake, New York. Detailed sectioning and analysis reveal that there are discontinuous gradients in226Ra content in these samples. These gradients result from periods of rapid growth (>1 mm/100 years) separated by periods of no growth of erosion. Although the226Ra “age” of the nodules approximates the age of Oneida Lake, the nodules are not sediment-covered because they occur only in areas of the lake where fine-grained sediments are not accumulating. |
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