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Ordovician chitinozoan biozonation of the Brabant Massif, Belgium
Samuelsson, J.; Verniers, J. (2000). Ordovician chitinozoan biozonation of the Brabant Massif, Belgium. Rev. Palaeobot. Palynol. 113(1-3): 105-129. dx.doi.org/10.1016/S0034-6667(00)00055-5
In: Review of Palaeobotany and Palynology. Elsevier: Tokyo; Oxford; Lausanne; New York; Shannon; London; Amsterdam. ISSN 0034-6667, more
Peer reviewed article  

Available in  Authors 
    VLIZ: Open Repository 279477 [ OMA ]

Keywords
    Ordovician; Chitinozoa; Marine
Author keywords
    Avalonia; biostratigraphy; Brabant Massif; chitinozoan; Ordovician;palaeobiogeography

Authors  Top 
  • Samuelsson, J.
  • Verniers, J., more

Abstract
    Chitinozoans from seven Ordovician units (Abbaye de Villers, Tribotte, Rigenee, Ittre, Bornival, and Brutia formations and a new unnamed unit, here provisionally called the Asquempont unit) belonging to the mainly concealed Brabant Massif, Belgium are described herein. Fifty-six samples were taken from rocks cropping out at the south-eastern rim of the massif in the Orneau, Dyle-Thyle and Senne-Sennette valleys. Microfossil preservation is moderate to poor, and the chitinozoans occur in low numbers. Taxonomically, the recovered chitinozoans are distributed into 29 taxa, some placed under open nomenclature. Together with earlier published graptolite and acritarch data, the analysis of the chitinozoan assemblages resulted in an improved chronostratigraphy of the investigated formations. We propose a local chitinozoan biozonation with 11 zones for the Brabant Massif. The oldest investigated units yielded chitinozoans typical for North Gondwana, and younger units (starting in the middle Caradoc), yielded some tars also common in Baltica. As the Brabant Massif formed part of the microcontinent Avalonia, the chitinozoan assemblages recovered from the massif support the inferred drifting of Avalonia from high latitudes towards middle latitudes in the Ordovician as was suggested earlier.

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