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Non-exponential 210Pb profiles in certain lakes most in New England and pollen dates suggest that bioturbation, physical mixing, changes in sedimentation rate, or acidification may be occurring, but this is insufficient to account for the deviant 137Cs profiles. Additional dating of the New England cores was based on chronostratigraphic pollen markers. If your browser does not accept cookies, you cannot view this site.Philosophical Transactions of 137cs dating Royal Society of London B, 327, 331- 38.Evaluation of 210Pb dating in lake sediments 137ce stable Pb, Ambrosia pollen, and 137Cs. Keywords, Aaby, Evidence from some lakes suggests that this radionuclide may be adequately mobile to compromise dating reliability.
Such approximate ages, however, may still useful in corroborating interpretations made using the trench stratigraphy, or, at sites which have long earthquake recurrence intervals, determining which earthquake event was responsible for a particular bed offset.