Journal of Micropalaeontology
Journal of Micropalaeontology
JM
Articles | Volume 44, issue 2
Articles | Volume 44, issue 2
https://doi.org/10.5194/jm-44-601-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/jm-44-601-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 44, issue 2
Research article
 | 
02 Dec 2025
Research article |  | 02 Dec 2025

Low-latitude biostratigraphy and diversity of planktonic foraminifera from the middle Eocene to early Oligocene

Adam Woodhouse, Bridget S. Wade, Tom Dunkley Jones, Carina Hoorn, and Kirsty M. Edgar

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Short summary
Between 44–34 million years ago, Earth's climate substantially cooled, leading to permanent Antarctic glaciation and major ocean changes. This caused high extinction rates amongst marine organisms, including the planktonic foraminifera. New data from the western Atlantic Ocean highlight how these organisms responded, where surface species declined and deeper species increased in abundance, reflecting shifts in vertical ocean structure during this key climate transition.
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