Articles | Volume 18, issue 22
https://doi.org/10.5194/bg-18-5929-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-18-5929-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
22 Nov 2021
Research article |
| 22 Nov 2021
Pyrite-lined shells as indicators of inefficient bioirrigation in the Holocene–Anthropocene stratigraphic record
Adam Tomašových
CORRESPONDING AUTHOR
Earth Science Institute, Slovak Academy of Sciences, Bratislava,
84005, Slovakia
Michaela Berensmeier
Department of Palaeontology, University of Vienna, Althanstrasse 14,
1090 Vienna, Austria
Ivo Gallmetzer
Department of Palaeontology, University of Vienna, Althanstrasse 14,
1090 Vienna, Austria
Alexandra Haselmair
Department of Palaeontology, University of Vienna, Althanstrasse 14,
1090 Vienna, Austria
Martin Zuschin
Department of Palaeontology, University of Vienna, Althanstrasse 14,
1090 Vienna, Austria
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Short summary
The timescale of mixing and irrigation of sediments by burrowers that affect biogeochemical cycles is difficult to estimate in the stratigraphic record. We show that pyrite linings in molluscan shells preserved below the mixed layer represent a signature of limited bioirrigation. We document an increase in the frequency of pyrite-lined shells in cores collected in the northern Adriatic Sea, suggesting that bioirrigation rates significantly declined during the late 20th century.
The timescale of mixing and irrigation of sediments by burrowers that affect biogeochemical...
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