Veldhoven Formation
The Veldhoven Formation is a geologic formation in the subsurface of the Netherlands. The formation consists of an alternation of marine clay and sand from the Oligocene epoch.
Lithology
The Veldhoven Formation has a shallow marine or beach facies. It consists of an alternation of glauconiferous and micaceous fine sands and micaceous clays. In some places hardgrounds or shell-rich layers occur.The formation is Chattian, 28.4 to 23.0 million years old.
Stratigraphy
The Veldhoven Formation is part of the Middle [North Sea Group] and is named after the town of Veldhoven in North Brabant, the type location. Actually the type section is in a well log, since the formation only rarely crops out at the surface.The formation is subdivided into three members :
- the Someren Member, glauconiferous fine sand;
- the Wintelre Member, greenish silty clay;
- the Voort Member, greenish clayey sand, locally rich in fossils, especially molluscs and otoliths
The formation can be correlated with the Belgian Voort Formation.