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Environnements paraliques à ambre et à végétaux du Crétacé Nord-Aquitain (Charentes, Sud-Ouest de la France)

Abstract : New fossil deposits with amber and plants were discovered in Albian and Cenomanian
strata from Charente-Maritime, SW France. One of these, dated as Albian, constitutes one of
the most important deposits of Cretaceous amber, regarding its richness and diversity of
inclusions. Insects and arthropods are abundant, but few plant and vertebrate remains (one
feather and a fragment of reptilian skin) are also found. In addition to the common
associations of arthropods trapped in the resin along the trunk or branches, this amber has
exceptionally preserved numerous litter-dwelling arthropods. The botanical origin of the
amber is discussed after a comparison between taphonomical, xylological and chemical
analysis.
A detailed systematic study is given for some insects which are particularly significant
for the knowledge of the evolutionary history of their group, or informative from a
paleoenvironmental or paleobiogeographic point of view. Numerous plant remains are
associated in amber-bearing strata, which provide additional paleoecological and
paleoenvironmental data.
Regional reconstruction of the coastal terrestrial ecosystems is proposed from a
sedimentological analysis of amber-bearing strata, together with paleoecological data from
fossil assemblages. These fossil deposits contribute to the knowledge of the Cretaceous
paleobiota, which constituted the first steps of our recent ecosystems.
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Submitted on : Friday, February 17, 2006 - 4:29:45 PM
Last modification on : Thursday, January 14, 2021 - 11:38:43 AM
Long-term archiving on: : Saturday, April 3, 2010 - 8:05:07 PM

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  • HAL Id : tel-00011639, version 1

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Citation

Vincent Perrichot. Environnements paraliques à ambre et à végétaux du Crétacé Nord-Aquitain (Charentes, Sud-Ouest de la France). Autre. Université Rennes 1, 2003. Français. ⟨tel-00011639⟩

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