Amino acid racemization in <i>Neogloboquadrina pachyderma</i> and <i>Cibicidoides wuellerstorfi</i> from the Arctic Ocean and its implications for age models

West, Gabriel; Kaufman, Darrell S.; Jakobsson, Martin; O'Regan, Matt

doi:https://doi.org/10.5194/gchron-5-285-2023

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.

https://doi.org/10.5194/gchron-5-285-2023

© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 5, issue 1

Research article

|

19 Jun 2023

Research article |

| 19 Jun 2023

Amino acid racemization in Neogloboquadrina pachyderma and Cibicidoides wuellerstorfi from the Arctic Ocean and its implications for age models

Gabriel West, Darrell S. Kaufman, Martin Jakobsson, and Matt O'Regan

Supplement

https://doi.org/10.5194/gchron-5-285-2023-supplement

Data sets

Quaternary Arctic Ocean Foraminifer Amino Acid Racemization Data G. West, D. S. Kaufman, M. Jakobsson, and M. O'Regan https://www.ncei.noaa.gov/access/paleo-search/study/38040

Quaternary Arctic Ocean Foraminifer Amino Acid Racemization Data G. West, D. S. Kaufman, M. Jakobsson, and M. O'Regan https://doi.org/10.25921/bx56-4d69

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.