Code
SLCU
Status
Formal (NAM & RGD 1980). Amended (Herngreen & Wong 1989; Van Adrichem Boogaert & Kouwe 1993).
Lithological description
Greyish brown, fine-grained, carbonaceous sandstones, separated by a silty clay succession. Both sand intervals, but especially the upper sand bed, tend to display a funnel-shaped GR-log pattern.
Depositional setting
Marginal marine barrier-island system.
Definition of lower boundary
Conformably underlain by the Middle Graben Formation.
Definition of upper boundary
Conformably overlain by the marine claystones of the Kimmeridge Clay Formation. To the south, the formation grades into the paralic Puzzle Hole Formation at the southern margin of blocks F05-F08 (Herngreen & Wong 1989).
Thickness indication
Generally less than 181 m, but up to 305 m in MDZ-02.
Geographical distribution
Regional correlation
UK: Humber Group; GER: ?; BEL: -.
Age
late Oxfordian.
Holostratotype
Well:
Depth (thickness) AH:
2547 - 2670 m (123 m)
Origin of name
Named after the Central Graben.
Previous name(s)
None.
Reviewed by (date)
Sander Houben (2017).
References
NAM & RGD 1980. Stratigraphic nomenclature of The Netherlands. Verhandelingen van het Koninklijk Nederlands Geologisch Mijnbouwkundig Genootschap 32, 77 p.
Herngreen, G.F.W. and Wong, Th.E. 1989. Revision of the ’Late Jurassic’ stratigraphy of the Dutch Central North Sea Graben - Geol. en Mijnbouw, 68, p. 73-105.
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]). Upper Graben Formation. In: Stratigraphic Nomenclature of the Netherlands, TNO – Geological Survey of the Netherlands. Accessed on [DATE] from http://acc.dinoloket.nl/en/stratigraphic-nomenclature/upper-graben-formation.