LES FORMATIONS DU ...
LES FORMATIONS DU FRASNIEN DE LA BELGIQUE
F. Boulvain, P. Bultynck, M. Coen, M. Coen-Aubert, D. Lacroix, M. Laloux, J.-G. Casier, L. Dejonghe, V. Dumoulin, P. Ghysel, J. Godefroid, S. Helsen, N.A. Mouravieff, P. Sartenaer, F. Tourneur & M. VanguestaineMemoirs of the GSB n°44 - 1999
ABSTRACT.
This memoir on the Frasnian formations of Belgium is the result of meetings and field trips of the National Subcommission on Devonian Stratigraphy. It was prepared in collaboration with geologists involved in the new mapping program of Wallonia at scale 1/25 000. Seventeen formations are described. Six of them (Aisemont, Barvaux, Bovesse, Franc-Waret, Matagne en Rhisnes) are weIl known from literature. The eleven others (Grands Breux, Huccorgne, Lambermont, Lustin, Moulin Liénaux, Neuville, Nismes, Philippeville, Pont de la Folle, Presles and Valisettes) were introduced during the last twenty five years. AIl these formations are revised and presented in files giving a brief historical account, location of the reference sections, lithology, limits and thickness at the stratotype or the reference sections, lateral variations, ages and eventual uses. Furthermore, each formation is documented by the location of the outcrops on a portion of the relevant topographic map (scale 1/10000) and by a cross-section or a stratigraphic log of the stratotype or other reference sections. Lastly, the tables in the opening section provide information on the historical subdivisions of the Frasnian in Belgium, the stratigraphic correlations between the Frasnian formations from different structural units recognized in this work and the stratigraphic distribution of the taxa of the fossil groups cited in the text.
