Formal (NAM & RGD 1980). Amended (Van Adrichem Boogaert & Kouwe 1997). Renamed (2019).
Light green-grey, locally glauconitic, usually thin fine sand with a fining-upward character. It can be very argillaceous, and may locally contain some well-cemented layers. In the southeastern part of the province of Noord-Brabant, the Oosteind Member comprises several sand bodies separated by clay beds, the sand bodies can be up to 20 m thick. Blue-violet to grey tuffaceous intercalations may occur.
Definition of lower boundary
Generally formed by a sharp transition to the argillaceous Liessel Member of the Landen Formation. Only in the southeastern Netherlands, where this unit is underlain by the Reusel Member the boundary may be less obvious. However, the latter is a coarsening-upward, more argillaceous, small-scale alternation of sand and clay layers with higher gamma-ray readings, whereas the Oosteind Member is fining upward, clean, reworked and yields low gamma-ray readings.
Definition of upper boundary
Rather sharp transition to the Ieper Member.
Origin of name
Named after a village in the Dutch province of Noord-Brabant.
Basal Dongen Sand Member (Van Adrichem Boogaert & Kouwe 1997). The name "Dongen" was already in use as formation name.
NAM & RGD 1980. Stratigraphic nomenclature of The Netherlands. Verhandelingen van het Koninklijk Nederlands Geologisch Mijnbouwkundig Genootschap 32, 77 p.
Van Adrichem Boogaert, H.A. & Kouwe, W.F.P. 1997. Stratigraphic nomenclature of The Netherlands, revision and update by RGD and NOGEPA, Section I, Tertiary. Mededelingen Rijks Geologische Dienst, 50, 1-39.
TNO-GDN ([YEAR]). Oosteind Member. In: Stratigraphic Nomenclature of the Netherlands, TNO – Geological Survey of the Netherlands. Accessed on [DATE] from https://www.dinoloket.nl/en/stratigraphic-nomenclature/oosteind-member.