Code
NUKIBR
Status
Formal (Westerhoff 2003).
Lithological description
Stiff greyish brown to dark brown clay, slightly sandy to very silty. Intercalated layers of fine to medium sand and lignite.
Depositional setting
Meandering fluvial (floodplain, swamp), lacustrine.
Definition of lower boundary
Generally sharp contact with fluvial sand and gravel (Waubach Member, Kieseloolite Formation).
Definition of upper boundary
Generally exposed at the surface. Elsewhere, transition into Kieseloolite Formation (undifferentiated).
Thickness indication
Up to about 80 m.
Geographical distribution
Southeasternmost Netherlands, including Roer Valley Graben.
Regional correlation
North Sea: not present; UK: not present; GER: Rotton Member, Kieseloolith Formation; BEL: part of the Mol Formation, Kiezeloöliet Formation, Brunssum I, Pey and Brunssum II Members.
Age
Pliocene.
Lectostratotype
Well:
Depth (thickness) AH:
68 - 94 m (26 m) and 113 - 128.7 m (15.7 m) below land surface
Origin of name
Named after the village of Brunssum, on the German border in the southeasternmost Netherlands.
Previous name(s)
Brunssum Clay (Doppert et al. 1975).
Reviewed by (date)
Wim Dubelaar (2018), Sytze van Heteren (2019).
References
Doppert, J.W.Chr., Ruegg, G.H.J., Van Staalduinen, C.J., Zagwijn, W.H., Zandstra, J.G. 1975. Formaties van het Kwartair en Boven-Tertiair in Nederland. In: Zagwijn, W.H., Van Staalduinen, C.J. (eds.): Toelichting bij geologische overzichtskaarten van Nederland. Rijks Geologische Dienst, Haarlem, 11-56.
Westerhoff, W.E. 2003. Beschrijving lithostratigrafische eenheid. Nederlands Instituut voor Toegepaste Geowetenschappen TNO. Utrecht.
Cite as
TNO-GDN ([YEAR]). Brunssum Member. In: Stratigraphic Nomenclature of the Netherlands, TNO – Geological Survey of the Netherlands. Accessed on [DATE] from https://www.dinoloket.nl/en/stratigraphic-nomenclature/brunssum-member.