Scruff Group

Formal (Van Adrichem Boogaert & Kouwe 1993). The SK-Group, SG-Group and SL-Group can be taken together as Upper Jurassic Supergroup (code S).
Lithological description

Succession of locally bituminous claystones with thin intercalated carbonate beds and glauconitic, sometimes argillaceous, fine- to coarse-grained sandstones.

Depositional setting

Variety of marine environments from restricted (lagoonal) to open marine (outer shelf) conditions.

Definition of lower boundary

Conformably overlies the (paralic to) terrestrial sands of the Schieland Group. Towards the basin margin this contact may become unconformable.

Definition of upper boundary

Mildly unconformably overlain by sediments of the Rijnland Group. Generally, change in colour and log patterns is seen at the contact. The Chalk or Lower North Sea groups can also be found overlying this group.

Thickness indication
Up to 405 m (F18-05).
Geographical distribution
Regional correlation
UK: Humber Group; GER: ?; BEL: -.
late Oxfordian - Berriasian.
Depth (thickness) AH:
1682 - 2547 m (865 m)
Origin of name
Named after the offshore Upper Scruff Bank in the North Sea, which lies adjacent to the reference well F03-03.
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..
Cite as
TNO-GDN ([YEAR]). Scruff Group. In: Stratigraphic Nomenclature of the Netherlands, TNO – Geological Survey of the Netherlands. Accessed on [DATE] from