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Contribution to the stratigraphy of the Ordovician Rigenée formation (Brabant Massif, Belgium) with a preliminary study on acritarchs
The Rigenée formation of supposed Llandeilian age is studied in the Thyle and Orneau Valleys at the southern border of the Brabant Massif.
In its type locality of the Thyle Valley the Rigenée formation consists of a monotonous succession of greyish-black mudstones, at least 400 m thick. It overlays conformably the Tribotte formation, but its top is unobserved yet.
The acritarch species recorded in 22 samples indicate an Ordovician (Arenig-Llanvirn and/or Llandeilo) age. The sections at Tilly (Gentissart Valley) and Gembloux (Orneau Valley) can be correlated with parts of the section described in the Thyle Valley which provides several distinct assemblages.
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A propos de : Thomas Servais
Grant-holder I.R.S.I.A. ; Université de Liège, Services associés de Paléontologie, 7, place du XX Août - B-4000 LIEGE (Belgium)