Z1 Carbonate Member ZEZ1C


Type section Location map See figure (pdf)
  Well Rossum-Weerselo-3 (pdf)
  Location N 52°21’03.5
E 06°54’38.2
  Depth 1801 to 1803 m
  Length 2 m along hole
  Reference (NAM and RGD, 1980
Additional section Location map See figure (pdf)
  Well Vries-1 (pdf)
  Location N 53°02’14.7
E 06°35’40.4
  Depth 3110 to 3121 m
  Length 11 m along hole
Definition The Z1 Carbonate Member or ‘Zechsteinkalk’ commonly grades from argillaceous limestone at the base into crystalline dolomite at the top. The unit contains variable amounts of anhydrite, which explains the mostly gradational boundary with the overlying unit, the Z1 Anhydrite Member. Consequently, the boundary between these two units is sometimes ambiguous. In the sub-basins and the fringe areas the unit becomes very thick, permitting a subdivision into an argillaceous part (Z1 Lower Claystone Member) and a carbonate part (Z1 Fringe Carbonate Member). For cases where it is not possible to discern the Z1 Carbonate Member from the overlying Z1 Anhydrite Member, the term Z1 Anhydrite/Carbonate member (ZEZ1B) can be applied. This member has, however an informal status, since in most cases discrimination between these two members is possible.
References See References Permian

Van Adrichem Boogaert, H.A. & Kouwe, W.F.P., 1993-1997. [Stratigraphic unit]. In: Stratigraphic Nomenclature of the Netherlands.
Retrieved [Datum] from [url].