A tectonically driven 60 million-year biogeochemical redox cycle paces marine biodiversity

The fossil record shows a prominent 60 million-year biodiversity cycle during the Phanerozoic Eon, the origin of which is still unknown. Here we use time-series analysis and correlation of empirical and model datasets of Earth’s interior and surficial processes to demonstrate that this cycle is a pervasive feature in marine animal genus-level diversity data that dominates in the Paleozoic Era. Our results suggest that extinctions are likely the primary driver of this observed cyclicity. We detected a correlatable 60 million-year cyclicity in global tectonics, and in marine 87Sr/86Sr and δ34S isotopes, all of which are dominant in the Paleozoic. We conclude that continental weathering driven by global tectonic degassing and building of continental arcs may have in turn controlled paleo-seawater redox cycling during the Paleozoic when oceans were likely less saturated with respect to oxygen. In particular, we suggest that the 60 million-year fluctuations in biotic diversity are responses ..., , # Paleobiodiversity data tables

Dataset DOI: [10.5061/dryad.v41ns1s7j](10.5061/dryad.v41ns1s7j)

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**A tectonically driven 60 million-year biogeochemical cycle paces marine biodiversity**

Slah Boulila1,2*, Shanan E. Peters3, R. Dietmar Müller4, Andrew Zaffos5, Juraj Farkaš6, Bilal U. Haq1,7

1 Sorbonne Université, CNRS, Institut des Sciences de la Terre Paris, ISTeP, F-75005 Paris, France.

2 ASD/IMCCE, CNRS-UMR8028, Observatoire de Paris, PSL University, Sorbonne Université, 77 Avenue Denfert-Rochereau, 75014 Paris, France.

3 Department of Geoscience, University of Wisconsin–Madison, Madison, Wisconsin, USA.

4 EarthByte Group, School of Geosciences, University of Sydney, Sydney, New South Wales 2006, Australia.

5 Arizona State Geological Survey, University of Arizona, Tucson, Arizona, USA.

6 Metal Isotope Group, Department of Earth Sciences, School of Physical Sciences, University o..., ,