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Description et étude des ostracodes de deux tranchées traversant la limite historique Frasnien-Famennien dans la localité type
Casier, J.-G. (1992). Description et étude des ostracodes de deux tranchées traversant la limite historique Frasnien-Famennien dans la localité type. Bull. Kon. Belg. Inst. Natuurwet. Aardwet. = Bull. - Inst. r. sci. nat. Belg., Sci. Terre 62: 109-119
In: Bulletin van het Koninklijk Belgisch Instituut voor Natuurwetenschappen. Aardwetenschappen = Bulletin de l'Institut Royal des Sciences Naturelles de Belgique. Sciences de la Terre. KBIN: Brussel. ISSN 0374-6291, more
Peer reviewed article  

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Keywords
Author keywords
    Frasnian-Famennian boundary, extinction, ostracods, paleoecology, dysaerobic facies, Limite Frasnien-Famennien, Ostracodes, paléoécologie, dysaérobiose

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  • Casier, J.-G., more

Abstract
    Study of two new trenches dug at Senzeilles shows the sudden change from a dysaerobic to a well oxygenated environment at the boundary between shales with "Matagne" aspect and transition shales. This event located 3.5 m below the base of Senzeilles shales seems the same as the event observed at the top of the Kellwasserkalk in Kellerwald and Harz. The dysaerobic community contents numerous ostracods belonging to Entomozoacea and Cypridinacea super-families. The faunal renewal begins with the appearance of a very abundant benthonic ostracod fauna and crinoïds, 2.5 m below the first appearance of the brachiopod macrofauna on which GOSSELET fixed last century the Frasnian-Famennian boundary. The mode of life of the Entomozoacea is discussed in answer to GROOS-UFFENORFE & SCHINDLER's recent paper (1990).

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