6533b823fe1ef96bd127ea67
RESEARCH PRODUCT
Un exemple de spéciation lié à l'eustatisme: l'apparition précoce de Schackoina cabri (foraminifère planctonique mésogéen)
Françoise Magniez-janninGérard DelanoyJean-gabriel Bréhéretsubject
AmmonitebiologyAptianOcean EngineeringBiozoneBiostratigraphybiology.organism_classificationCretaceouslanguage.human_languageForaminiferaPaleontologyPhanerozoiclanguageMesozoicEcology Evolution Behavior and SystematicsGeologydescription
Investigation of planktic foraminifers from the Lower Aptian of the Vocontian Basin (SE France) reveals that Schackoina cabri makes a very discrete first appearance in the Weissi ammonite zone and not in the Deshayesi zone, i.e. before the global anoxic event OAE 1a and not after as was accepted in the literature. This discovery seems to support the recent model whereby speciation of planktic foraminifers occurred in marine lowstands and their real expansion during the ensuing sea-level rise.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1997-08-01 | Comptes Rendus de l'Académie des Sciences - Series IIA - Earth and Planetary Science |