Lower Silverpit Claystone Member ROCLL

 

Premise Full name: Lower Silverpit Claystone Member
  Defined by NAM and RGD (1980)
Derivatio nominis Name derived from the main lithology and the stratigraphic position in the lower 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 3438 to 3507 m
  Length 69 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 3814 to 3924 m
  Length 110 m along hole
  Reference .
  Well N04-01 (pdf)
  Location N 53°47’19.8
E 06°11’20.1
  Depth 3587 to 3758 m
  Length 171 m along hole
  Reference .
Definition Thick, red-brown, 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 can occur locally.
Upper Boundary The unit is overlain conformably by the Silverpit Evaporite Member. The boundary is placed at the base of the first thick evaporite (halite or locally anhydrite) bed.
Lower Boundary The member usually rests unconformably on the grey coal measures or orange-red, nodular claystones of the Limburg Group. In some instances (e.g. well N04-01 (see pdf) ) a thin Lower Slochteren Member is found at the base of the member.
Correlation The member reflects the first stage of deposition of the Upper Rotliegend Group, which was restricted to the centre of the basin.
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].