Code
RNKPM
Status
Formal (NAM & RGD 1980).
Lithological description
Grey, brown, grey-green to olive-green, silty and anhydritic claystones. Locally in the southern Dutch Central Graben, it includes up to 10 m thick, mineralogically immature, mica-bearing, grey to green-coloured, high-gamma-ray sandstones. The fine-grained sandstones may contain coaly plant-debris.
Depositional setting
Fluvial floodplain.
Definition of lower boundary
Not yet defined.
Definition of upper boundary
Not yet defined.
Thickness indication
Up to 160 m in the Dutch Central Graben and in the P quadrant; in other areas it varies between 10 and 50 m.
Geographical distribution
Regional correlation
UK: Arden Sandstone Formation; GER: Stuttgart Formation (Schilfsandstein); BEL: Middle Keuper Claystone Member.
Age
Carnian.
Holostratotype
Well:
Depth (thickness) AH:
3030 - 3076 m (46 m)
Parastratotype
Well:
Depth (thickness) AH:
1677 - 1703 m (26 m)
Origin of name
None.
Previous name(s)
None.
Reviewed by (date)
Johan ten Veen (2017).
References
NAM & RGD 1980. Stratigraphic nomenclature of The Netherlands. Verhandelingen van het Koninklijk Nederlands Geologisch Mijnbouwkundig Genootschap 32, 77 p.
Cite as
TNO-GDN ([YEAR]). Middle Keuper Claystone Member. In: Stratigraphic Nomenclature of the Netherlands, TNO – Geological Survey of the Netherlands. Accessed on [DATE] from https://www.dinoloket.nl/en/stratigraphic-nomenclature/middle-keuper-claystone-member.