Articles | Volume 5, issue 1
https://doi.org/10.5194/gchron-5-285-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/gchron-5-285-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
19 Jun 2023
Research article |
| 19 Jun 2023
| 19 Jun 2023
Amino acid racemization in Neogloboquadrina pachyderma and Cibicidoides wuellerstorfi from the Arctic Ocean and its implications for age models
Department of Geological Sciences, Stockholm University, Stockholm,
10691, Sweden
Bolin Centre for Climate Research, Stockholm University, Stockholm,
10691, Sweden
Darrell S. Kaufman
School of Earth and Sustainability, Northern Arizona University,
Flagstaff, AZ 86011, USA
Martin Jakobsson
Department of Geological Sciences, Stockholm University, Stockholm,
10691, Sweden
Bolin Centre for Climate Research, Stockholm University, Stockholm,
10691, Sweden
Department of Geological Sciences, Stockholm University, Stockholm,
10691, Sweden
Bolin Centre for Climate Research, Stockholm University, Stockholm,
10691, Sweden
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Short summary
We report aspartic and glutamic acid racemization analyses on Neogloboquadrina pachyderma and Cibicidoides wuellerstorfi from the Arctic Ocean (AO). The rates of racemization in the species are compared. Calibrating the rate of racemization in C. wuellerstorfi for the past 400 ka allows the estimation of sample ages from the central AO. Estimated ages are older than existing age assignments (as previously observed for N. pachyderma), confirming that differences are not due to taxonomic effects.
We report aspartic and glutamic acid racemization analyses on Neogloboquadrina pachyderma and...
