Opglabbeek Formation
The Opglabbeek Formation is a geologic formation in the subsurface of the eastern part of Belgian Limburg. The formation consists of lagoonal and fluvial clay and sand and was deposited during the early Selandian. The formation is named after the town of Opglabbeek in Limburg.
The Opglabbeek Formation is subdivided into two members: the Opoeteren Member and the Eisden Member. Some authors describe a third member: the Maasmechelen Member, but this is alternatively seen as part of the Eisden Member.
The Opglabbeek Formation has a thickness between 20 and 60 meters. It lies stratigraphically on top of the Houthem Formation. On top of it lies the Heers Formation. The Opglabbeek Formation is divided into the Hesbaye Group and can be correlated with parts of the Landen Formation of adjacent areas in the southern Netherlands.
