Sedimentology and biostratigraphy of the Visean carbonates of the Heibaart (DzH1) borehole (Northern Belgium)

The Visean strata of the Heibaart borehole (DzH1, Campine-Brabant Basin, northern Belgium) can be divided into four lithological units. Biostratigraphical data indicate that the first unit was formed during the Late Moliniacian (foraminifer subzone Cf4d), the second during the Livian (Cf5), the third and the fourth during the Early Warnantian (subzones Cf6a-ß and Cf6? respectively).The Upper Moliniacian bioclastic packstones and grainstones were deposited in a shallow open marine environment in which water turbulence and circulation rates were high enough to prevent a considerable accumulation... Mehr ...