Terschelling Sandstone Member

Formal (Van Adrichem Boogaert & Kouwe 1993). Amended (Munsterman et al. 2012).
Lithological description

Fine- to medium-grained sandstone (occasionally up to coarse sand and gravel), well to poorly sorted. Carbonate cement, glauconite and lignite are common. Sandstones predominantly show fining but locally coarsening upward trends.

Depositional setting

Barrier island complex, including shoreface to foreshore and washover fans environments.

Definition of lower boundary

Conformable basal contact with the Oyster Ground Member is characterised by a sharp downhole change to finer-grained deposits (base of the sandstone bed), the appearance of restricted-marine (lagoonal) fossils, a change towards higher GR log readings and a more serrated sonic log pattern. In the type section well L06-02, the member unconformably rests on the Altena Group. In the deepest part of the Terschelling Basin, in well L03-01, interfingering occurs with the Oyster Ground Member.

Definition of upper boundary

Conformably overlain by the shallow marine calcareous claystones of the Lies Member. The top of the Terschelling Sandstone Member is diachronous.

Thickness indication
Up to 170 m (L06-05-S1).
Geographical distribution
Regional correlation
UK: Kimmeridge Clay Formation (Humber Group); GER: ?; BEL: -.
Depth (thickness) AH:
2463 - 2500 m (37 m)
Depth (thickness) AH:
2399 - 2482 m (83 m)
Origin of name
Named after the Terschelling Basin, where this member is typically developed.
Previous name(s)
Reviewed by (date)
Sander Houben (2017).
Van Adrichem Boogaert, H.A. & Kouwe, W.F.P. 1993. Stratigraphic nomenclature of The Netherlands; revision and update by RGD and NOGEPA, Section G, Upper Jurassic and Lower Cretaceous. Mededelingen Rijks Geologische Dienst, 50, 1-80..
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]). Terschelling Sandstone Member. In: Stratigraphic Nomenclature of the Netherlands, TNO – Geological Survey of the Netherlands. Accessed on [DATE] from https://www.dinoloket.nl/en/stratigraphic-nomenclature/terschelling-sandstone-member.