The upper part consists of fine grained, locally argillaceous sandstones. The lower part consists of a cyclic alternation of glauconitic and argillaceous sandstones, grading into bioclastic limestones.
Shallow marine environment, during tectonic inversion.
Rests unconformably on older rocks of Triassic, Permian and Carboniferous age.
Nature of the contact with the overlying Vaals Formation is gradual.
Breda-Val kenswaard and Oss-Roermond. NITG-TNO (Utrecht) 150 p.
Geologisch Mijnbouwkundig Genootschap, Mijnbouwkundige Serie 5, 133 p.