Code
ZEZ1G
Status
Formal (Van Adrichem Boogaert & Kouwe 1994).
Lithological description
Grey to brown claystone or marl, in places dolomitic or anhydritic. Shows an upwards increase in carbonate content, grading from claystone into marl.
Depositional setting
Shallow marine, carbonate slope.
Definition of lower boundary
Placed at the top of the Fringe Coppershale Member.
Definition of upper boundary
Placed at the base of the first prominent carbonate bed of the Z1 Fringe Carbonate Member.
Thickness indication
Up to 81 m.
Geographical distribution
Regional correlation
UK: ?; GER: ?; BEL: Z1 Lower Claystone Member.
Age
early Wuchiapingian.
Holostratotype
Well:
Depth (thickness) AH:
2847 - 2878 m (31 m)
Parastratotype
Well:
Depth (thickness) AH:
4576 - 4620 m (44 m)
Parastratotype
Well:
Depth (thickness) AH:
3867 - 3871 m (4 m)
Parastratotype
Well:
Depth (thickness) AH:
2061 - 2066 m (5 m)
Origin of name
None.
Previous name(s)
None.
Reviewed by (date)
Mark Geluk (2017).
References
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 Claystone 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-claystone-member.