Algues Givetiennes du bord sud du bassin de Dinant et des régions limitrophes
Mamet, B.; Preat, A. (1986). Algues Givetiennes du bord sud du bassin de Dinant et des régions limitrophes. Ann. Soc. Géol. Belg. (1968) 109(2): 431-454
In: Annales de la Société géologique de Belgique. Vaillant-Carmanne: Liège. ISSN 0037-9395, more
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| Keywords |
Geological time > Phanerozoic > Paleozoic > Palaeozoic > Devonian > Devonian, Middle > Givetian
Algae
Belgium, Wallonia [Marine Regions]
Marine/Coastal |
| Abstract |
The carbonate sedimentation of the Dinant Synclinorium givetian platform is controlled by moderate but steady subsidence. More than four hundred meters of shallow-water limestones were accumulated. Most of these are semi-restricted to restricted and are the lateral equivalents of bioconstructions. Carbonate production, mainly in the lagoons, is linked to algal proliferation. Forty-six genera are recognized among spongiostromids, porostromids. codiaceans, udoteaceans, phylloids?, dasyclads, solenoporids, coccoids, charophytes, umbellinids, calcispheres and incertae sedis. Bevocastria is the most prolific alga. Carbonate build-ups are erected by phylloids?, giant dasyclads and Sphaerocodium. The widespread occurrence of rudstone sheets is due to the scarcity of stabilizing solenoporids. |
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