Code
ZEZ3G
Status
Formal (NAM & RGD 1980). Amended (Van Adrichem Boogaert & Kouwe 1994).
Lithological description
Grey claystone with a high gamma-ray response and corresponding low velocities on the sonic log.
Depositional setting
Shallow marine transgressive unit at the base of the 3rd evaporite cycle.
Definition of lower boundary
The top of the anhydrite of the underlying Z2 Roof Anhydrite Member
Definition of upper boundary
Base of the carbonate Z3 Carbonate Member
Thickness indication
Up to 24 m.
Geographical distribution
Regional correlation
UK: Grauer Salzton Formation; GER: Grauer Salzton; BEL: Grey Salt Clay Member.
Age
late Wuchiapingian.
Holostratotype
Depth (thickness) AH:
1327 - 1331 m (4 m)
Parastratotype
Depth (thickness) AH:
2547 - 2548 m (1 m)
Hypostratotype
Well:
Depth (thickness) AH:
4435 - 4437 m (2 m)
Hypostratotype
Well:
Depth (thickness) AH:
3834 - 3836 m (2 m)
Hypostratotype
Well:
Depth (thickness) AH:
1989 - 1992 m (3 m)
Origin of name
None.
Previous name(s)
None.
Reviewed by (date)
Mark Geluk (2017).
References
NAM & RGD 1980. Stratigraphic nomenclature of The Netherlands. Verhandelingen van het Koninklijk Nederlands Geologisch Mijnbouwkundig Genootschap 32, 77 p.
Van Adrichem Boogaert, H.A. & Kouwe, W.F.P. 1994. Stratigraphic nomenclature of The Netherlands; revision and update by RGD and NOGEPA, Section D, Permian. Mededelingen Rijks Geologische Dienst, 50, 1-42.
Cite as
TNO-GDN ([YEAR]). Grey Salt Clay Member. In: Stratigraphic Nomenclature of the Netherlands, TNO – Geological Survey of the Netherlands. Accessed on [DATE] from https://www.dinoloket.nl/en/stratigraphic-nomenclature/grey-salt-clay-member.