Oosteind Member

Formal (NAM & RGD 1980). Amended (Van Adrichem Boogaert & Kouwe 1997). Renamed (2019).
Lithological description

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.

Depositional setting


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.

Thickness indication
Up to 45 m.
Geographical distribution
Regional correlation
UK: ?; GER: ?; BEL: ?
early Eocene (Ypresian).
Depth (thickness) AH:
985 - 993 m AH (8 m)
Depth (thickness) AH:
1259 - 1279 m AH (20 m)
Origin of name
Named after a village in the Dutch province of Noord-Brabant.
Previous name(s)
Basal Dongen Sand Member (Van Adrichem Boogaert & Kouwe 1997). The name "Dongen" was already in use as formation name.
Reviewed by (date)
Geert-Jan Vis (2019).
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.
Cite as
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.