Code
NUBRVR
Status
Formal (Zagwijn & Van Staalduinen 1975).
Lithological description
Brownish yellow to greenish grey very fine to fine sand, slightly to moderately silty, commonly glauconitic.
Depositional setting
Shallow marine (glauconitic sand), coastal (silica sand) (Van der Meulen et al. 2009).
Definition of lower boundary
Locally, rounded flint at base. Sharp, unconformable contact with coastal-lowland sand (Heksenberg Member, Breda Formation).
Definition of upper boundary
May be exposed at the surface. Locally, palaeosol at top. Sharp contact with fluvial sand (Kieseloolite Formation) or with various Quaternary units.
Thickness indication
Up to about 90 m.
Geographical distribution
Southeasternmost part of the Netherlands.
Regional correlation
North Sea: not present; UK: not present; GER: ?; BEL: Bolderberg Formation (Vernes et al. 2018).
Age
late middle Miocene.
Type section
Well:
Not yet determined.
Depth (thickness) AH:
Not yet determined.
Origin of name
Named after the Vrijherenberg area near the city of Heerlen in the southeastern Netherlands.
Previous name(s)
Part of the former Heksenberg Formation.
Reviewed by (date)
Dirk Munsterman (2018), Sytze van Heteren (2019).
References
Van der Meulen, M.J., Westerhoff, W.E., Menkovic, A., Gruijters, S.H.L.L., Dubelaar, C.W., Maljers, D. 2009. Silica sand resources in the Netherlands. Netherlands Journal of Geosciences 88, 147-160.
Vernes, R.W., Deckers, J., Bakker, M.A.J., Bogemans, F., De Ceukelaire, M., Doornenbal, J.C., den Dulk, M., Dusar, M., Van Haren, T.F.M., Heyvaert, V.M.A., Kiden, P., Kruisselbrink, A.F., Lanckacker, T., Menkovic, A., Meyvis, B., Munsterman, D.K., Reindersma, R., ten Veen, J.H., van de Ven, T.J.M., Walstra, J., Witmans, N. 2018. Geologisch en hydrogeologisch 3D model van het Cenozoïcum van de Belgisch-Nederlandse grensstreek van Midden-Brabant / De Kempen (H3O – De Kempen). Studie uitgevoerd door VITO, TNO-Geologische Dienst Nederland en de Belgische Geologische Dienst in opdracht van Vlaams Planbureau voor Omgeving, Vlaamse Milieumaatschappij, TNO, Geologische Dienst Nederland, Nederlandse Provincie Noord-Brabant, Brabant Water, Programmabureau KRW/DHZ Maasregio.
Zagwijn, W.H. & Van Staalduinen, C.J. 1975. Toelichting bij geologische overzichtskaarten van Nederland, met bijbehorende 5 kaarten (1 : 600 000) en 3 overzichtsprofielen. Rijks Geologische Dienst, Haarlem.
Cite as
TNO-GDN ([YEAR]). Vrijherenberg Member. In: Stratigraphic Nomenclature of the Netherlands, TNO – Geological Survey of the Netherlands. Accessed on [DATE] from http://acc.dinoloket.nl/en/stratigraphic-nomenclature/vrijherenberg-member.