The information on this page is a summary description.
The full formal description is available here: Vert Galand Formation
Abbreviation
VEG
Parent unit
Child unit
Bruyelle Member, Merlin Member
Lithological description
The Vert Galand Formation groups the marly facies of Turonian age, which were known as “Dièves” and “Fortes Toises”. The Vert Galand Formation (VEG) consists of two distinctive members, the Bruyelle and Merlin Members. Summary description from Hennebert & Doremus (1997a, b), from top to bottom:
VEG Fm Merlin Member: greenish-grey marls, with fine glauconite; white marl with grey siliceous concretions.
VEG Fm, Bruyelle Member: greenish-grey marl, with phosphatised gravel at the base; pale-grey marl with fine to coarse glauconite grains.
Age
Turonian
Thickness
Up to 75 m in the Mons basin, 50 m in the Tournai basin.
Area of occurrence
Mons (Haine) and Tournai basins, transgressing over the Brabant Parautochton, extending into the North of France.
Type locality
No formal stratotype defined for the formation. The 19th century quarries in Tournaisian limestone of the ‘quartier Longuesault – Barges – Vert Galand’ southwest of Tournai allowed observations of the Cretaceous overburden. Decimal geographical coordinates for Rue du Vert Galant 50,576 – 3, 363; Lambert ’72 coordinates 78750 – 141100.
Alternative names
Authors
Dusar, M.
Date
01/12/2017
Cite as
Dusar, M., 2017. The Vert Galand Formation, 01/12/2017. National Commission for Stratigraphy Belgium. http://ncs.naturalsciences.be/lithostratigraphy/Vert-Galand-Formation
