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 unit | |
| 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 strata: Bracquegnies Formation, Late Albian in age (early “vraconnian”; Amédro, 2002). Overlying strata: Ville-Pommeroeul Formation, Late Turonian in age, locally called “Glauconitite de Thieu” or “Verts à têtes-de-chats” (Robaszynski, 1975; Robaszynski et al., 2001). |
| Age | Yans et al. (2002, 2005a, 2005b), Yans (2003), Yans (2007) assigned a Late Turonian age, combining dating of grains of glauconite and using stratigraphy of overlying strata. The revised lithostratigraphy of Belgium for this period would be as followed. |
| Thickness | 36.0 m in the stratotype borehole (141W-418G). Following Gulinck (1974), variations of thickness are rapid and frequent in the Thieu area. |
| Area of occurrence | Eastern part of the Mons Basin. Gulinck (1974) mentioned its occurrence in the area of Thieu and Gottignies. Only known as subsurface occurrence. |
| Type locality | Borehole 141W-418G (Fig. 1 and 2; description from Gulinck & Laga, Public records of the Geological Survey of Belgium). Lambert coordinates: X= 131116, Y=129475, Z (ground level) = 56.7 m; depth interval 6.0 – 42.0 m. A parastratotype, showing the Strépy Formation with grains of glauconite overlied by Ville-Pommeroeul Formation, is borehole 141W-473E (description from Gulinck, Public records of the Geological Survey of Belgium). Lambert coordinates: X= 131830, Y= 130120, Z (ground level) = 104.4 m; depth interval 30.0 – 38.0 m. |
| Alternative names | |
| Authors | Yans, J., Hennebert, M. & Vanneste, C. |
| Date | 01/01/2010 |
| Cite as | Yans, J., Hennebert, M. & Vanneste, C., 2010. The Strépy Formation, 01/01/2010. National Commission for Stratigraphy Belgium. http://ncs.naturalsciences.be/lithostratigraphy/Strepy-Formation |
