Z2 Salt Member

Code
ZEZ2H
Status
Formal (NAM & RGD 1980). Amended (Van Adrichem Boogaert & Kouwe 1994).
Lithological description

Consists mainly of halite. Three cycles can be recognised and are separated by polyhalite beds (Geluk 1995). The lower cycle is characterised at its base by interbedded anhydrite, claystone and polyhalite layers in the salt. The middle cycle is built up of several sub-cycles, with an upwards-increasing potassium content. Along the edge of the salt basin potassium-magnesium-rich layers occur. The upper cycle consists of very pure rock salt, with some potassium-magnesium salt layers near the top. Among the minerals identified are kieserite, carnallite and sylvite.

Depositional setting

Salina deposit, marine evaporite.

Definition of lower boundary

The Z2 Basal Anhydrite forms the base of the salt.

Definition of upper boundary

The base of the Grey Salt Clay Member forms the top of the Z3 Salt Member.

Thickness indication
Depositional thickness 1000-1250 m, but thickness often is increased as a result of salt flow, sometimes to over 2000 m.
Geographical distribution
Regional correlation
UK: Stassfurt Halite Formation; GER: Decksteinsalz and Stassfurt Steinsalz & Stassfurt Kaliflöz; BEL: Z2 Salt Member.
Age
Wuchiapingian.
Holostratotype
Well:
Depth (thickness) AH:
1335 - 1358 m (23 m)
Parastratotype
Well:
Depth (thickness) AH:
2553 - 2818 m (265 m)
Origin of name
None.
Previous name(s)
None.
Reviewed by (date)
Mark Geluk (2017).
References
Geluk, M.C. 1995. Stratigraphische Gliederung der Z2-(Staßfurt-)Salzfolge in den Niederlanden: Beschreibung und Anwendung bei der Interpretation von halokinetisch gestörten Sequenzen. Zeitschrift der deutschen geologischen Gesellschaft 146, 458-465.
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]). Z2 Salt Member. In: Stratigraphic Nomenclature of the Netherlands, TNO – Geological Survey of the Netherlands. Accessed on [DATE] from https://www.dinoloket.nl/en/stratigraphic-nomenclature/z2-salt-member.