Articles | Volume 41, issue 1
https://doi.org/10.5194/jm-41-1-2022
© Author(s) 2022. 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-41-1-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Astronomical calibration of late middle Eocene radiolarian bioevents from ODP Site 1260 (equatorial Atlantic, Leg 207) and refinement of the global tropical radiolarian biozonation
Mathias Meunier
CORRESPONDING AUTHOR
Univ. Lille, CNRS, UMR 8198 – Evo-Eco-Paleo, 59000 Lille, France
Taniel Danelian
Univ. Lille, CNRS, UMR 8198 – Evo-Eco-Paleo, 59000 Lille, France
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Vitalina Lokteva, Vahram Serobyan, Martin Tetard, Pierre Breuer, and Taniel Danelian
J. Micropalaeontol., 45, 405–413, https://doi.org/10.5194/jm-45-405-2026, https://doi.org/10.5194/jm-45-405-2026, 2026
Short summary
Short summary
This study develops a semi-automated workflow using artificial intelligence to detect and classify Devonian miospores in microscopic slides. Focusing on three biostratigraphically important species used for dating rocks and correlating distant localities, the method achieved high accuracy, reduced observer bias, and accelerated analysis. This workflow offers a scalable tool for research and potential industrial applications in fossil-based stratigraphy.
Veronica Carlsson, Taniel Danelian, Pierre Boulet, Philippe Devienne, Aurelien Laforge, and Johan Renaudie
J. Micropalaeontol., 41, 165–182, https://doi.org/10.5194/jm-41-165-2022, https://doi.org/10.5194/jm-41-165-2022, 2022
Short summary
Short summary
This study evaluates the use of automatic classification using AI on eight closely related radiolarian species of the genus Podocyrtis based on MobileNet CNN. Species belonging to Podocyrtis are useful for middle Eocene biostratigraphy. Numerous images of Podocyrtis species from the tropical Atlantic Ocean were used to train and validate the CNN. An overall accuracy of about 91 % was obtained. Additional Podocyrtis specimens from other ocean realms were used to test the predictive model.
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Short summary
This study presents the biostratigraphic analysis of radiolaria (siliceous zooplankton) from a section of middle Eocene age located in the equatorial Atlantic. Our study allows the refinement of the age of 71 radiolarian bioevents. Based on a comparison with previously reported ages in the equatorial Pacific and northwestern Atlantic, we establish the synchronicity of several bioevents between the two oceans. Some of these synchronous bioevents were used to define seven new subzones.
This study presents the biostratigraphic analysis of radiolaria (siliceous zooplankton) from a...