Articles | Volume 28, issue 1
https://doi.org/10.1144/jm.28.1.53
© Author(s) 2009. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.1144/jm.28.1.53
© Author(s) 2009. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Chitinozoans and the age of the Soom Shale, an Ordovician black shale Lagerstätte, South Africa
Thijs R. A. Vandenbroucke
Department of Geology, University of Leicester, University Road, Leicester LE1 7RH, UK
Current address: Research Unit Palaeontology, Ghent University WE13, Krijgslaan 281/S 8, 9000 Ghent, Belgium
Sarah E. Gabbott
Department of Geology, University of Leicester, University Road, Leicester LE1 7RH, UK
Florentin Paris
Université de Rennes, Géosciences-Rennes, UMR 6118 du CNRS, Campus de Beaulieu, 35042 Rennes-cedex, France
Richard J. Aldridge
Department of Geology, University of Leicester, University Road, Leicester LE1 7RH, UK
Johannes N. Theron
Department of Geology, University of Stellenbosch, Private Bag XI, Stellenbosch 7602, South Africa
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Anticosti Island has a well-preserved rock succession throughout the Aeronian–Telychian boundary in the Llandovery Epoch, Silurian period, which includes two important biogeochemical events, the late Aeronian and the Valgu. This study suggests the position of this boundary in Anticosti based on the correlation of the island’s chitinozoan assemblages with the global occurrences, confirming both a remarkable preservation of upper Aeronian rocks and the record of the Valgu event.
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We used new geochemical measurements to study the expression of astronomical climate cycles recorded in the Ordovician (~ 460 million years ago) geological sections of the Crozon Peninsula (France). This type of geological archive is not often studied in this way, but as they become more important going back in time, a better understanding of their potential astronomical cycles is crucial to advance our knowledge of deep-time climate dynamics and to construct high-resolution timescales.
Carolina Klock, André Desrochers, Patrick I. McLaughlin, Poul Emsbo, Tim De Backer, Fien M. Jonckheere, Cristiana J. P. Esteves, and Thijs R. A. Vandenbroucke
J. Micropalaeontol., 43, 475–495, https://doi.org/10.5194/jm-43-475-2024, https://doi.org/10.5194/jm-43-475-2024, 2024
Short summary
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Anticosti Island has a well-preserved rock succession throughout the Aeronian–Telychian boundary in the Llandovery Epoch, Silurian period, which includes two important biogeochemical events, the late Aeronian and the Valgu. This study suggests the position of this boundary in Anticosti based on the correlation of the island’s chitinozoan assemblages with the global occurrences, confirming both a remarkable preservation of upper Aeronian rocks and the record of the Valgu event.
Matthias Sinnesael, Alfredo Loi, Marie-Pierre Dabard, Thijs R. A. Vandenbroucke, and Philippe Claeys
Geochronology, 4, 251–267, https://doi.org/10.5194/gchron-4-251-2022, https://doi.org/10.5194/gchron-4-251-2022, 2022
Short summary
Short summary
We used new geochemical measurements to study the expression of astronomical climate cycles recorded in the Ordovician (~ 460 million years ago) geological sections of the Crozon Peninsula (France). This type of geological archive is not often studied in this way, but as they become more important going back in time, a better understanding of their potential astronomical cycles is crucial to advance our knowledge of deep-time climate dynamics and to construct high-resolution timescales.
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