Sédimentologie des faciès “Marbres Noirs” du paléozoïque franco-belge

This study works out the sedimentation of upper paleozoic formations of Belgium and northern France.It deals with sequential analysis of calcareous facies, more particularily, the so-called « black marbles »; it is possible to recognize a number of « rythmic patterns » which can be followed laterally from quarry to quarry. These « rhythms » have chronostratigraphic value; coupled with local markers, they enable the building of an extremely precise paleogeography.The petrographic investigation of the strata of « black marbles » leads to a more general classification of limestones in which the t... Mehr ...