Articles | Volume 44, issue 2
https://doi.org/10.5194/jm-44-469-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/jm-44-469-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
03 Nov 2025
Research article |
| 03 Nov 2025
| 03 Nov 2025
Biometric insights on the calcareous nannofossil genus Aspidolithus across the Santonian–Campanian boundary: Western Interior (Niobrara, USA) vs. Tethys (Loibichl and Postalm, Austria) sections
Paula Granero
CORRESPONDING AUTHOR
Department of Geology, University of Vienna, Josef-Holaubek-Platz 2, 1090 Vienna, Austria
Michael Wagreich
Department of Geology, University of Vienna, Josef-Holaubek-Platz 2, 1090 Vienna, Austria
Adam Wierzbicki
Institute of Geological Sciences, Jagiellonian University in Krakow, Gronostajowa 3a, 30-387 Krakow, Poland
David Watkins
Department of Earth and Atmospheric Sciences, University of Nebraska-Lincoln, 329 Bessey Hall, Lincoln, NE 68588-0340, USA
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Short summary
We present a morphometric study of the calcareous nannofossil Aspidolithus across the Santonian–Campanian boundary, based on material from the Western Interior (USA) and the Tethys (Austria). The results reveal that size variation correlates with sea surface temperature. These findings have implications for the taxonomy, palaeoecology, and biostratigraphy of Upper Cretaceous planktonic assemblages.
We present a morphometric study of the calcareous nannofossil Aspidolithus across the...
