Z2 Salt Member ZEZ2H

 

Type section Location map See figure (pdf)
  Well Rossum-Weerselo-3 (pdf)
  Location N 52°21’03.5
E 06°54’38.2
  Depth 1335 to 1358 m
  Length 23 m along hole
  Reference (NAM and RGD, 1980).
Additional section Location map See figure (pdf)
  Well Uithuizermeeden-1 (pdf)
  Location N 53°26’58.9
E 06°48’29.2
  Depth 2553 to 2818 m
  Length 265 m along hole
  Reference (NAM and RGD, 1980).
Definition The Z2 Salt Member consists mainly of halite. In this member, three cycles can be recognised, which can be correlated regionally across the southern North Sea (Cameron et al., 1992). The evaporite cycles are separated by polyhalite beds (RGD, 1991). The lower cycle is characterised at its base by interbedded anhydrite, claystone and polyhalite layers in the salt. This gives the salt a serrate log character. 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. These salts form the equivalent of the Stassfurt Potash seam in northwest Germany. Among the minerals identified are kieserite, carnallite and sylvite. In the sub-basins the salt is thin, and probably only the lower or middle cycle of the Z2 Salt Member is developed here.
References See References Permian

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