Code
ZEZ2A
Status
Formal (NAM & RGD 1980). Amended (Van Adrichem Boogaert & Kouwe 1994).
Lithological description
Generally developed as a massive body of relatively pure anhydrite.
Depositional setting
Sabkha anhydrite.
Definition of lower boundary
Boundary with the underlying Z2 Carbonate Member.
Definition of upper boundary
Boundary with the overlying Z2 Salt Member.
Thickness indication
Usually 5 to 10 m, in exceptional cases 15 m.
Geographical distribution
Regional correlation
UK: Basalanhydrit Formation; GER: Unterer Stassfurt Anhydrit, Basalanhydrit; BEL: Z2 Basal Anhydrite Member.
Age
Wuchiapingian.
Holostratotype
Depth (thickness) AH:
1358 - 1365 m (7 m)
Parastratotype
Depth (thickness) AH:
2818 - 2823 m (5 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]). Z2 Basal Anhydrite 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-basal-anhydrite-member.