Code
ZEZ1A
Status
Formal (NAM & RGD 1980). Amended (Van Adrichem Boogaert & Kouwe 1994).
Lithological description
Massive anhydrite, dolomite stringers occur frequently in the unit.
Depositional setting
Marine.
Definition of lower boundary
Not yet determined.
Definition of upper boundary
The unit is only recognised in the presence of an overlying Z1 Salt Member.
Thickness indication
Up to 210 m.
Geographical distribution
Regional correlation
UK: Lower Anhydrite Member; GER: Unterer Werra Andhydrit; BEL: Z1 Lower Anhydrite Member.
Age
Wuchiapingian.
Holostratotype
Depth (thickness) AH:
1725 - 1801 m (76 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]). Z1 Lower 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/z1-lower-anhydrite-member.