Open WL Archief (OWA)

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Het OWA, het open archief van het Waterbouwkundig Laboratorium heeft tot doel alle vrij toegankelijke onderzoeksresultaten van dit instituut in digitale vorm aan te bieden. Op die manier wil het de zichtbaarheid, verspreiding en gebruik van deze onderzoeksresultaten, alsook de wetenschappelijke communicatie maximaal bevorderen.

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one publication added to basket [220121]

Late Givetian to Middle Frasnian ostracods from Nismes (Dinant Synclinorium, Belgium) and their lithological context Casier, J.-G.; Préat, A. (2009). Late Givetian to Middle Frasnian ostracods from Nismes (Dinant Synclinorium, Belgium) and their lithological context. Bull. Kon. Belg. Inst. Natuurwet. Aardwet. = Bull. - Inst. r. sci. nat. Belg., Sci. Terre 79: 87-115 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, meer

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Beschikbaar in	Auteurs
VLIZ: Open access 240381 [ download pdf ]

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Trefwoorden

Geological time > Phanerozoic > Paleozoic > Palaeozoic > Devonian > Devonian, Middle Geological time > Phanerozoic > Paleozoic > Palaeozoic > Devonian > Devonian, Middle > Givetian Geological time > Phanerozoic > Paleozoic > Palaeozoic > Devonian > Devonian, Upper Geological time > Phanerozoic > Paleozoic > Palaeozoic > Devonian > Devonian, Upper > Frasnian Ostracoda [WoRMS] Belgium, Viroinval [Marine Regions] Marien/Kust

Author keywords

Ostracods, Microfacies, Palaeoecology, Givetian, Frasnian, Dinant Synclinorium, Belgium

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Auteurs		Top
Casier, J.-G., meer Préat, A., meer

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Abstract

About 2,450 carapaces, valves and fragments of ostracods have been extracted from 94 samples collected in the Fromelennes, Nismes and Moulin Liénaux Formations at Nismes, close to Frasnes (southern border of the Dinant Synclinorium, Belgium). Sixty-three taxa belonging to the Eifelian Mega-Assemblage are recognized. The only significant change as deduced from the ostracod fauna is the progressive transition from lagoonal and semi-restricted environments to open-marine environments in the upper part of the Fromelennes Fm. The Polyzygia beckmanni beckmanni Zone and the Favulella lecomptei Zone established on metacopid ostracods are recognized at Nismes, and the simultaneous occurrence of these two species in a sample collected in the upper part of the Sourd d’Ave Mbr implies the emendation of the definition of the P. beckmanni beckmanni Zone. The new definition is: presence of P. beckmanni beckmanni before the first occurrence of F. lecomptei. A new species, Ovatoquasillites nismesensis nov. sp., is described. The sedimentological analysis confirms that the transition of the Givetian and Frasnian stages does not correspond to a particular event. The evolution of the lithological curve across the Givetian / Frasnian boundary allows the recognition of 5 sequences recording a general drowning of the Givetian carbonate platform. No effective barrier system was active at that time suggesting that the Givetian carbonate platform was already dismantled prior to its definitive drowning.

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