Formal (Van Adrichem Boogaert & Kouwe 1993). The SK-Group, SG-Group and SL-Group can be taken together as Upper Jurassic Supergroup (code S).
Succession of locally bituminous claystones with thin intercalated carbonate beds and glauconitic, sometimes argillaceous, fine- to coarse-grained sandstones.
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.
UK: Humber Group; GER: ?; BEL: -.
late Oxfordian - Berriasian.
Origin of name
Named after the offshore Upper Scruff Bank in the North Sea, which lies adjacent to the reference well F03-03.
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..
TNO-GDN ([YEAR]). Scruff Group. In: Stratigraphic Nomenclature of the Netherlands, TNO – Geological Survey of the Netherlands. Accessed on [DATE] from http://www.dinoloket.nl/en/stratigraphic-nomenclature/scruff-group.