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Une analyse des assemblages de kystes de dinoflagellés et des acritarches réalisée sur le site de l'ANDRA (Agence Nationale pour la gestion des Déchets RAdioactifs) à Soulaines (Centre de l'Aube, Bassin de Paris, France) montre une discontinuité chronostratigraphique entre, d'une part, les Argiles à Plicatules (d'âge Aptien inférieur) et les Argiles Ostréennes (datées de la limite Barrémien inférieur–Barrémien...
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