The information on this page is a summary description. The full formal description is available here: Chalk group Abbreviation Parent unit Child units Thivencelles Marls Formation, Thulin Marls Formation, Ville-Pommeroeul Chert Formation, Hautrage Flints Formation, Strépy Formation, Sint-Denis Silicite Formation, Maisières Chalk Formation, Nevele Formation, Saint-Vaast Chalk Formation, Trivières Chalk Formation, Obourg Chalk Formation, Nouvelles...
The information on this page is a summary description. The full formal description is available here: Bernissart Calcirudites Formation Abbreviation BRN Parent unit Haine Green Sandstone Group Child units Lithological description Granular to gravelly, organo-detritic, grey to yellow at outcrop, only slightly glauconitic limestones, with flints and a chalcedony cement, with sandy and glauconitic marl...
The information on this page is a summary description. The full formal description is available here: Thivencelles Marls Formation Abbreviation THV Parent unit Chalk group Child units Lithological description Clayey, soft, “plastic” when wet, swelling when exposed, generally green when fresh, but yellow after alteration at outcrop: these are the “Dièves moyennes” of J. Cornet...
The information on this page is a summary description. The full formal description is available here: Thulin Marls Formation Abbreviation THU Parent unit Chalk group Child units Lithological description Chalky marls, yellowish white at outcrop, green when fresh; occasionally chalk banks of a fewdecimetresthickness contain a denser sediment. The marls occasionally contain a coarser, glauconitic,...
The information on this page is a summary description. The full formal description is available here: Hainaut Group Abbreviation HAI Parent unit Child units Saint-Barbe Clays Formation, Hautrage Clays Formation, Baudour Clays Formation, Saint-Pierre Gravel Formation, Saint-Pierre Gravel Formation Lithological description Clays, sands and conglomerates deposited irregularly, in lenticular “heaps” along and above each other,...
The information on this page is a summary description. The full formal description is available here: Ville-Pommeroeul Chert Formation Abbreviation VPO Parent unit Chalk group Child units Lithological description Light-coloured, chalky, siliceous limestone, rarely marly, with numerous, more or less completelysilicifiedconcretions. Towards the top there is a progressive transition into black cherts of the Hautrage...
The information on this page is a summary description. The full formal description is available here: Saint-Barbe Clays Formation Abbreviation SBA Parent unit Hainaut Group Child units Lithological description Grey, sandy, lignitic and highly fossiliferous clays, filling a sinkhole. Age Thickness Area of occurrence Type locality In the former Ste-Barbe pit of Bernissart where the...
The information on this page is a summary description. The full formal description is available here: Hautrage Flints Formation Abbreviation HTR Parent unit Chalk group Child units Lithological description Chalky marls or coarse-grained chalks, slightly glauconitic, with numerous and voluminous irregular brown-black flints. These flints often contain numerous, small (mm size), white sponge spicules. Age...
The information on this page is a summary description. The full formal description is available here: Hautrage Clays Formation Abbreviation HAU Parent unit Hainaut Group Child units Lithological description Silto-quartzose,grey, white, reddish, black clays with intercalations of sandy,siltyand lignito-pyritic beds. Age Thickness Area of occurrence Type locality In the Hautrage clay pits; Alternative names Authors...
The information on this page is a summary description. The full formal description is available here: Strépy Formation Abbreviation STP Parent unit Chalk group Child units Lithological description Alternations of white-dark, fine-coarse sands, levels of lignite and white sandstones with fragments of plants (roots?). Grains of glauconite are locally found in coarse-medium white sands. Underlying...
