Code
RNKPS
Status
Formal (NAM & RGD 1980).
Lithologische beschrijving
Halites, alternating with anhydrites and grey, anhydritic claystones in basinal settings, notably in the Central Graben, the northern part of the Off Holland Low and the Ems Low. The halites disappear towards the basin margin.
Afzettingsmilieu
Playa lake.
Definitie ondergrens
Not yet defined.
Definitie bovengrens
Not yet defined.
Dikte indicatie
The member has its greatest thickness in the Dutch Central Graben (> 400 m). In graben structures in the Ems Low, the thickness increases locally to more than 1000 m (Frisch & Kockel 1997).
Geografische verbreiding
Regionale correlatie
UK: Dudgeon Formation and Keuper Halite Member; GER: Grabfeld Formation (Unterer Gipskeuper); BEL: Main Keuper Evaporite Member.
Ouderdom
latest Ladinian - Carnian.
Holostratotype
Well:
Depth (thickness) AH:
3076 - 3247 m (171 m)
Parastratotype
Well:
Depth (thickness) AH:
1641 - 1670 m (29 m)
Parastratotype
Well:
Depth (thickness) AH:
1703 - 1738 m (35 m)
Oorsprong naam
None.
Vorige benaming(en)
None.
Gereviewed door (datum)
Johan ten Veen (2017).
Referenties
NAM & RGD 1980. Stratigraphic nomenclature of The Netherlands. Verhandelingen van het Koninklijk Nederlands Geologisch Mijnbouwkundig Genootschap 32, 77 p.
Frisch, U. & Kockel, F. 1997. Altkimmerische Bewegungen in Nordwestdeutschland. Brandenburgische Geowissenschaftliche Beiträge 4, 19–29.
Cite as
TNO-GDN ([YEAR]). Main Keuper Evaporite Member. In: Stratigraphic Nomenclature of the Netherlands, TNO – Geological Survey of the Netherlands. Accessed on [DATE] from http://acc.dinoloket.nl/en/stratigraphic-nomenclature/main-keuper-evaporite-member.