Acritarches du Cambro-Ordovicien du massif du Brabant, Belgique

The outcrops of the « Quartzophyllades de Chevlipont » and the« Quartzophyllades de Villers-la-Ville » in both the Dyle and Thylevalleys, in the Province of Brabant, contain acritarch assemblages ofsixty-eight species and two subspecies. Four of the species are new : Micrhystridium pellitum, Vulcanisphaera flagellum, Impluviculus lenticularis and I. stellaris . These assemblages may be divided into threezones of late Cambrian to early Tremadocian, early Tremadocian, and Arenigian or Llanvirnian — more probably Llanvirnian — age, showingthat the « Assise » de Villers-la-Ville is younger than th... Mehr ...