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Chitinozoan biozonation and new lithostratigraphical data in the upper Ordovician of the Fauquez and Aquempont areas (Brabant Massif, Belgium)
Vanmeirhaeghe, J.; Storme, A.; Van Noten, K.; Van Grootel, G.; Verniers, J. (2005). Chitinozoan biozonation and new lithostratigraphical data in the upper Ordovician of the Fauquez and Aquempont areas (Brabant Massif, Belgium). Geol. Belg. 8(4): 145-159
In: Geologica Belgica. Geologica Belgica: Brussels . ISSN 1374-8505; e-ISSN 2034-1954, more
Peer reviewed article  
Available in  Authors 
Keywords
    Geological time > Phanerozoic > Paleozoic > Palaeozoic > Ordovician > Ordovician, Upper
    Chitinozoa
    Belgium, Braine-le-Comte [Marine Regions]
    Marine/Coastal; Fresh water
Author keywords
    Avalonia, biostratigraphy, Brabant Massif, correlation, chitinozoans, lithostratigraphy, Sennette valley, Upper Ordovician
Authors  Top 
  • Vanmeirhaeghe, J., more
  • Storme, A.
  • Van Noten, K.
  • Van Grootel, G.
  • Verniers, J., more
Abstract
    A chitinozoan biozonation is established for the Upper Ordovician rocks of the Sennette valley in the Fauquez area and the Asquempont area, revising the existing chitinozoan biozonation of the Brabant Massif. The chitinozoans of five formations (the Ittre, Bornival, Huet, Fauquez and Madot formations) are studied from 70 samples. The chitinozoan biozonation is correlated with Baltoscandia and the Avalonian Upper Ordovician type sections in the U.K. This correlation provides an accurate dating of the studied formations. A megaslumping event, affecting a part of the Ittre and Bornival Formation and causing the overturning of a pile of sediments estimated at minimum 200 m thick, may be placed in the mid Oandu (Cheneyan, middle Caradoc, early Stage 6"?). The volcanic rocks in the Fauquez area, formally thought to be restricted to the Ashgill, are confined to the late Caradoc - early Ashgill timespan. In addition to this, this paper presents new lithostratigraphical data on the Ittre Formation and the lower member of the Bornival Formation.
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