Woensdrecht Member

Formal (Westerhoff & Weerts 2003).
Lithological description

Grey to yellowish white very fine to fine sand, non-calcareous, partly micaceous, common clay pebbles. At the top, very fine sand with intercalated clay laminae and lenses, as well as bluish grey clay, non-calcareous, micaceous, with organic horizons. Overall fining-upward sequence. Locally bioturbated.

Depositional setting

Brackish inshore (estuarine) tidal, including channel, sand flat, mudflat, and marsh.

Definition of lower boundary

Sharp unconformable contact with coarser tidal sand (Hoogerheide Member, Waalre Formation).

Definition of upper boundary

Sharp unconformable contact with river sand (Waalre Formation, undifferentiated) or periglacial sand (Boxtel Formation, locally gravelly Beuningen Bed).

Thickness indication
Up to about 5 m. In its western reach, possibly up to 80 m (cf. Van Voorthuysen 1957).
Geographical distribution
Southwestern Netherlands.
Regional correlation
North Sea: not distinguished; UK: not present; GER: not present; BEL: Turnhout Member, Weelde Formation (Kempen Group; Wouters & Vandenberghe 1994).
early Pleistocene (Tiglian).
Not yet determined.
Depth (thickness) AH:
Not yet determined.
Proposed stratotype location: Woensdrecht Rijzende weg (Kasse 1988 , p.29).
Origin of name
Named after the village of Woensdrecht in the southwestern Netherlands, close to the Belgian border.
Previous name(s)
Originally part of the Tegelen Formation (Kasse 1988). Halsteren Deposits (Van Voorthuysen 1957).
Reviewed by (date)
Wim Dubelaar (2018), Sytze van Heteren (2019).
Kasse, C. 1988. Early Pleistocene tidal and fluvial environments in the southern Netherlands and northern Belgium. PhD Thesis, Vrije Universiteit Amsterdam, 190 p.
Van Voorthuysen, J.H. 1957. Algemeen geologisch overzicht tot een diepte van 40 meter. In: De Ridder, N.A. (ed.), Agrohydrologische profielen van Zeeland. Staatsdrukkerij, s-Gravenhage, 20-32.
Westerhoff, W.E., Weerts, H.J.T. 2003. Beschrijving lithostratigrafische eenheid. Nederlands Instituut voor Toegepaste Geowetenschappen TNO. Utrecht.
Cite as
TNO-GDN ([YEAR]). Woensdrecht Member. In: Stratigraphic Nomenclature of the Netherlands, TNO – Geological Survey of the Netherlands. Accessed on [DATE] from https://www.dinoloket.nl/en/stratigraphic-nomenclature/woensdrecht-member.