Code
NUBXSI
Status
Formal (Schokker et al. 2005; Schokker et al. 2007).
Lithological description
Grey to yellow very fine to medium sand, grey loam, and grey humic clay, sandy. Subordinate peat layers and gyttja.
Depositional setting
Small-scale fluvial or fluvioperiglacial (brook), including channel (sand), overbank (silt and clay) and swamp (peat and gyttja).
Definition of lower boundary
Sharp contact with glacial sediment (Drente Formation), gradual transition into fluvial sand (Kreftenheye and Stramproy Formations), unconformable contact with coversand (Wierden Member, Boxtel Formation) and loess (Liempde Member, Boxtel Formation).
Definition of upper boundary
Commonly exposed at the surface. Locally, sharp contact with tidal sand and clay (Naaldwijk Formation) or unconformable contact with coversand (Wierden Member, Boxtel Formation).
Thickness indication
Up to 5 m.
Geographical distribution
Along brook valleys in the eastern (Pleistocene) half of the Netherlands.
Regional correlation
North Sea: Twente Formation (mapped in conjunction with the British Geological Survey); UK: ?; GER: ?; BEL: part of the Gent Formation.
Age
Late Pleistocene (Weichselian) - Holocene.
Type section
Well:
Not yet determined.
Depth (thickness) AH:
Not yet determined.
Origin of name
Named after the estate Singraven, close to the German border in the eastern Netherlands (Van der Hammen & Wymstra 1971).
Previous name(s)
Singraven Formation (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.
Schokker, J, De Lang, F.D., Weerts, H.J.T., Den Otter, C., Passchier, S. 2005. Beschrijving lithostratigrafische eenheid. Nederlands Instituut voor Toegepaste Geowetenschappen TNO. Utrecht.
Schokker, J., Weerts, H.J.T., Westerhoff, W.E., Berendsen, H.J.A., Den Otter, C. 2007. Introduction of the Boxtel Formation and implications for the Quaternary lithostratigraphy of the Netherlands. Netherlands Journal of Geosciences / Geologie en Mijnbouw, 86, 197-210.
Van der Hammen, T., Wijmstra, T.A. (eds.) 1971. The upper Quaternary of the Dinkel valley (Twente, eastern Overijssel, the Netherlands). Mededelingen Rijks Geologische Dienst, Nieuwe serie 22, 55-213.
Cite as
TNO-GDN ([YEAR]). Singraven Member. In: Stratigraphic Nomenclature of the Netherlands, TNO – Geological Survey of the Netherlands. Accessed on [DATE] from http://acc.dinoloket.nl/en/stratigraphic-nomenclature/singraven-member.