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04-Sep-2017 19:50

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The sediment samples must remain totally undisturbed during sampling to obtain the best possible dating.

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The naturally lead isotope 210Pb may be used to date aquatic sediments and peat bogs.Pb has been used during more than 4 decades, through dating of undisturbed sediment cores, to study ecosystem changes during the last 100 yr.Since its inception, diverse dating models have been proposed, developed, used and validated in numerous environments, but their nomenclature and formulation is not homogenous.We could decide that the CRS was the best applicable model.

three sediment cores were taken from guanabara bay. Is this glass artificially vitrified (sharp quenching) or it becomes glassy at normal conditions (slow cooling)?