Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. 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.The Veldhoven Formation has a shallow marine (less than 200 meters deep) 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.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.