The University of Arizona
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A novel approach for developing high-resolution sub-fossil peat chronologies with (super 14) C dating.

T H Donders, F Wagner, K van der Borg, A F M de Jong, H Visscher

Abstract


Sub-fossil sections from a Florida wetland were accelerator mass spectrometry (AMS) dated and the sedimentological conditions were determined. (super 14) C data were calibrated using a combined wiggle-match and (super 14) C bomb-pulse approach. Repeatable results were obtained providing accurate peat chronologies for the last 130 calendar yr. Assessment of the different errors involved led to age models with 3-5 yr precision. This allows direct calibration of paleoenvironmental proxies with meteorological data. The time frame in which (super 14) C dating is commonly applied can possibly be extended to include the 20th century.

Keywords


absolute age;accelerator mass spectroscopy;C 13 C 12;C 14;calibration ;carbon ;Cenozoic ;chronology ;Collier County Florida;cores ;dates ;errors ;Fakahatchee Strand Preserve State Park;Florida ;graphite ;Holocene ;isotope ratios;isotopes ;mass spectroscopy;native elements;peat ;Quaternary ;radioactive isotopes;sediments ;spectroscopy ;stable isotopes;United States;wetlands

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