Upper Silverpit Claystone Member ROCLU

 

Premise Full name: Upper Silverpit Claystone Member
  Defined by NAM and RGD (1980) .
Derivatio nominis Name derived from the main lithology and the stratigraphic position in the upper part of the Silverpit Formation in the centre of the basin.
Type section Location map See figure (pdf)
  Well M09-01 (pdf)
  Location N 53°36’34.4
E 05°43’13.0
  Depth 3119 to 3258 m
  Length 139 m along hole
  Reference NAM and RGD (1980)
Additional section Location map See figure (pdf)
  Well G17-01 (pdf)
  Location N 54°04’29.9
E 05°30’41.0
  Depth 3319 to 3384 m
  Length 65 m along hole
  Well N04-01 (pdf)
  Location N 53°47’19.8
E 06°11’20.1
  Depth 3283 to 3405 m
  Length 122 m along hole
Definition Thick, red-rown, sandy clay- and siltstone interval with some intercalated sand-/siltstone stringers and beds. Anhydritic nodules are common in the claystones of some intervals. Some thin carbonate, anhydrite, and halite beds occur locally.
Upper Boundary The unit is overlain paraconformably by the black bituminous shales of the Coppershale Member of the Zechstein 1 (Werra) Formation.
Lower Boundary The member rests conformably on the Silverpit Evaporite Member, from which it can be discerned by the absence of thick beds of evaporites (halite and/or anhydrite).
Correlation The member reflects the last stage of deposition of the Upper Rotliegend Group, which was characterised by expansion of the lacustrine realm into the fringe of the basin. The Upper Silverpit Claystone Member is the distal equivalent of the Ten Boer Member in the transition zone and basin-fringe area.
Distribution The member is restricted to the centre of the basin. It can only be recognised where the Silverpit Evaporite Member is present.
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].