Code
SGSKN
Status
Formal (Munsterman et al. 2012).
Lithological description
Moderately to well-sorted, greenish-grey, slightly argillaceous, occasionally calcite cemented, glauconitic sandstones. Sediments show bioturbation and are locally pyritic, lignitic, and/or characterised by shell debris.
Depositional setting
Shallow marine environment, ranging from offshore to lower shore face.
Definition of lower boundary
With the Oyster Ground Member (Skylge Formation) is marked by a sharp downward increase in GR-log readings.
Definition of upper boundary
With the Scruff Spiculite Member is marked by funnel-shaped GR-log pattern, resulting from the upward decreasing clay content.
Thickness indication
Up to 316 m (F18-11).
Geographical distribution
Regional correlation
UK: Humber Group; GER: ?; BEL: -.
Age
Tithonian.
Holostratotype
Well:
Depth (thickness) AH:
3065 - 3276 m (211 m)
Origin of name
Named after the shoal in the western part of the Wadden island Terschelling.
Previous name(s)
None.
Reviewed by (date)
Sander Houben (2017).
References
Munsterman, D.K., Verreussel, R.M.C.H., Mijnlieff, H.F., Witmans, N., Kerstholt-Boegehold, S. & Abbink, O.A. 2012. Revision and update of the Callovian-Ryazanian Stratigraphic Nomenclature in the northern Dutch Offshore, i.e. Central Graben Subgroup and Scruff Group. Netherlands Journal of Geosciences-Geologie en Mijnbouw, 91 (4), 555-590.
Cite as
TNO-GDN ([YEAR]). Noordsvaarder Member. In: Stratigraphic Nomenclature of the Netherlands, TNO – Geological Survey of the Netherlands. Accessed on [DATE] from https://www.dinoloket.nl/en/stratigraphic-nomenclature/noordsvaarder-member.