Articles | Volume 17, issue 4
https://doi.org/10.5194/cp-17-1547-2021
https://doi.org/10.5194/cp-17-1547-2021
Research article
 | 
21 Jul 2021
Research article |  | 21 Jul 2021

Million-year-scale alternation of warm–humid and semi-arid periods as a mid-latitude climate mode in the Early Jurassic (late Sinemurian, Laurasian Seaway)

Thomas Munier, Jean-François Deconinck, Pierre Pellenard, Stephen P. Hesselbo, James B. Riding, Clemens V. Ullmann, Cédric Bougeault, Mathilde Mercuzot, Anne-Lise Santoni, Émilia Huret, and Philippe Landrein

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AR: Author's response | RR: Referee report | ED: Editor decision
ED: Publish subject to minor revisions (review by editor) (16 May 2021) by Yves Godderis
AR by Thomas Munier on behalf of the Authors (19 May 2021)  Author's response   Author's tracked changes   Manuscript 
ED: Publish as is (28 May 2021) by Yves Godderis
AR by Thomas Munier on behalf of the Authors (31 May 2021)
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Short summary
Clay minerals are witnesses of alteration conditions in continental environments. Lacking high-resolution data on clay minerals, this work highlights wet and semi-arid cycles at mid-latitude in the upper Sinemurian. The higher proportion of kaolinite in the upper part of the obtusum zone and in the oxynotum zone indicates an increase in hydrolysis conditions in a warmer period confirmed by carbon isotopes.