Strépy Formation

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.

Lithostratigraphic units

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