Mochras borehole revisited: a new global standard for Early Jurassic earth history
S. P. Hesselbo
Camborne School of Mines, College of Engineering, Mathematics and Physical Sciences, University of Exeter, Penryn Campus, Treliever Road, Penryn, Cornwall, TR10 9EZ, UK
C. J. Bjerrum
Geology Section, Department of Geosciences and Natural Resource Management, University of Copenhagen, Øster Voldgade 10, 1350 Kbh. K., Denmark
L. A. Hinnov
Department of Earth and Planetary Sciences, Johns Hopkins University, Baltimore, MD 21218, USA
C. MacNiocaill
Department of Earth Sciences, University of Oxford, South Parks Road, Oxford, OX1 3AN, UK
K. G. Miller
Department of Earth & Planetary Sciences, Rutgers, The State University of New Jersey, 610 Taylor Rd., Piscataway, NJ 08854-8066, USA
J. B. Riding
British Geological Survey, Keyworth, Nottingham NG12 5GG, UK
B. van de Schootbrugge
Institute of Earth Sciences, University of Utrecht, Budapestlaan 4, 3584 CD Utrecht, the Netherlands
the Mochras Revisited Science Team
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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
Clim. Past, 17, 1547–1566, https://doi.org/10.5194/cp-17-1547-2021, https://doi.org/10.5194/cp-17-1547-2021, 2021
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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.
Johan Vellekoop, Lineke Woelders, Appy Sluijs, Kenneth G. Miller, and Robert P. Speijer
Biogeosciences, 16, 4201–4210, https://doi.org/10.5194/bg-16-4201-2019, https://doi.org/10.5194/bg-16-4201-2019, 2019
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Our micropaleontological analyses on three cores from New Jersey (USA) show that the late Maastrichtian warming event (66.4–66.1 Ma), characterized by a ~ 4.0 °C warming of sea waters on the New Jersey paleoshelf, resulted in a disruption of phytoplankton communities and a stressed benthic ecosystem. This increased ecosystem stress during the latest Maastrichtian potentially primed global ecosystems for the subsequent mass extinction following the Cretaceous–Paleogene boundary impact.
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