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impact des variations paléoclimatiques sur la sédimentation carbonatée au Valanginien

Abstract : The detailed study of depositional geometries and facies of sedimentary successions from the Jura platform to the Vocontian trough (SE France) shows that the Valanginian (Cretaceous) global carbonate crisis is recorded as a multistep process. The development of ice caps at high latitudes led to sea-level fluctuations of several tens of meters. Global cooling associated with an increase of nutrient input linked to moister climate as well as decreasing sea-level then led to diminishing carbonate platform production and install ramp facies until the demise of these systems in the Late Valanginian. Comparing this event with the Aptian-Albian crisis suggests that the greenhouse-dominated Mesozoic may have been interrupted several times by icehouse episodes.
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https://tel.archives-ouvertes.fr/tel-00275099
Contributor : Benjamin Gréselle <>
Submitted on : Tuesday, April 22, 2008 - 2:42:48 PM
Last modification on : Wednesday, December 2, 2020 - 9:56:07 AM
Long-term archiving on: : Friday, November 25, 2016 - 9:06:16 PM

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  • HAL Id : tel-00275099, version 1

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Benjamin Gréselle. impact des variations paléoclimatiques sur la sédimentation carbonatée au Valanginien. Minéralogie. Université Claude Bernard - Lyon I, 2007. Français. ⟨tel-00275099⟩

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