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 unit | |
| 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 Formation. Fauna is extremely rare. |
| Age | Late Turonian on the basis of Micraster leskei, recorded from Harchies. |
| Thickness | 4 to 30 m. |
| Area of occurrence | Mons Basin. In the eastern part of the basin, the Formation also contains glauconite, and becomes a “glauconitite” with siliceous nodules of up to 10 cm in size; when altered they have a powdery aspect: Also known as the “Verts à têtes-de-chat” auct. (see J. Cornet, 1923) or the “Glauconitite de Thieu” (see Robaszynski, 1975c). |
| Type locality | Motorway cutting, at the bridge connecting Ville-Pommeroeul and Rond du Bois-de-Ville (see Robaszynski, 1975b, p. 35). |
| 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 Ville-Pommeroeul Chert Formation, 01/01/2001. National Commission for Stratigraphy Belgium. http://ncs.naturalsciences.be/lithostratigraphy/Ville-Pommeroeul-Chert-Formation |
