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Update of the Devonian lithostratigraphic subdivision in the subsurface of the Campine Basin (northern Belgium)
Lagrou, D.; Coen-Aubert, M. (2017). Update of the Devonian lithostratigraphic subdivision in the subsurface of the Campine Basin (northern Belgium). Geol. Belg. 20(1-2): 13 pp. https://dx.doi.org/10.20341/gb.2016.017
In: Geologica Belgica. Geologica Belgica: Brussels . ISSN 1374-8505; e-ISSN 2034-1954, meer
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Booischot Formation; Givetian; Frasnian; Famennian; lithostratigraphy;biostratigraphy |
| Abstract |
The continental and mainly conglomeratic Booischot Formation is formally introduced for the strata intersected close to the base of the Booischot borehole from the Campine Basin. It is nearly 400 m thick and its upper part is Upper Givetian to Upper Frasnian in age whereas its lower part has not been dated so far. The Booischot borehole is overlain by the Upper Devonian marine Aisemont and Falisolle Formations which are capped by Famennian sandstones assigned to the Evieux Formation. These latter three lithostratigraphic units are also present in the Heibaart borehole, above a few metres of the Middle Frasnian Huccorgne Formation which rest directly on the Caledonian basement of the Brabant Massif, without any trace of the Booischot Formation. It appears that in the Campine Basin, the Devonian transgression arrived very late during the Frasnian. The Devonian succession at the northern margin of the Brabant Massif is very different from that of the north side of the Namur Basin and the Vis area characterized more particularly by the occurrence of Givetian marine deposits. Some rugose corals of this stage are figured for the first time from the Vis area. The conglomerates of the Booischot Formation are also compared to similar thick strata from the Givetian of NW Germany. |
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