Geochronology
Geochronology
GChron
Articles | Volume 5, issue 1
Articles | Volume 5, issue 1
https://doi.org/10.5194/gchron-5-229-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/gchron-5-229-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 5, issue 1
Research article
 | 
04 May 2023
Research article |  | 04 May 2023

Ultra-distal tephra deposits and Bayesian modelling constrain a variable marine radiocarbon offset in Placentia Bay, Newfoundland

Alistair J. Monteath, Matthew S. M. Bolton, Jordan Harvey, Marit-Solveig Seidenkrantz, Christof Pearce, and Britta Jensen

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Short summary
Accurately dating ocean cores is challenging because the radiocarbon age of water masses varies substantially. We identify ash fragments from eruptions more than 4000 km from their source and use these time markers to develop a new age–depth model for an ocean core in Placentia Bay, North Atlantic. Our results show that the radiocarbon age of waters masses in the bay varied considerably during the last 10 000 years and highlight the potential of using ultra-distal ash deposits in this region.
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