Abstract
SEVERAL elements, such as manganese, vary considerably in concentration in different sediments. Factors such as chemical weathering, run off from the continents and physicochemical conditions in the transport medium or in the region of deposition may cause these variations, and volcanic and biological processes may also produce manganese-enriched deposits. The effect of such processes on the areal distribution of manganese has been extensively studied, but their effect on the temporal distribution of manganese is little known. Wangersky and Hutchinson1 found that Caribbean sediments from the last four glaciations are rich in manganese. My data indicate that manganese, copper and calcium carbonate are enriched in sediments from most glacial periods in the Caribbean.
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BOSTRÖM, K. Deposition of Manganese Rich Sediments during Glacial Periods. Nature 226, 629–630 (1970). https://doi.org/10.1038/226629a0
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DOI: https://doi.org/10.1038/226629a0
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