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 unit | |
| 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 beds. Towards the base the limestones are coarse, conglomeratic, glauconitic and ferruginous: this is the Hautrage Conglomerate Bed (Robaszynski, 1975c) or “Tourtia”, as seen in local names such as “Tourtia de Tournai”, “Tourtia de Montignies-sur-Roc”; “Tourtia du Pas-de-Calais” in northern France, “Tourtia” or “Sarrazin de Bellignies”. |
| Age | Early and Middle Cenomanian age on the basis of the ammonites Mantelliceras mantelli (Early Cenomanian), Acanthoceras rhotomagense (Middle Cenomanian) and Schloenbachia varians and the oyster Amphidonte obliquatum. |
| Thickness | 2 to 30 m and sometimes more in the most subsided parts of the basin. |
| Area of occurrence | From the western part of the Mons Basin to the north of France. |
| Type locality | |
| Alternative names | |
| Authors | Robaszynski, F., Dhondt, A.V. & Jagt, J.W.M. |
| Date | 01/01/2001 |
| Cite as | Robaszynski, F., Dhondt, A.V. & Jagt, J.W.M., 2001. The Bernissart Calcirudites Formation, 01/01/2001. National Commission for Stratigraphy Belgium. http://ncs.naturalsciences.be/lithostratigraphy/Bernissart-Calcirudites-Formation |
