Weiteveen Upper Evaporite Member SKWFD

 

Premise Definition extended after NAM and RGD (1980) . Correlated with the lower Upper M√ľnder Marl in Germany by t Hart (1969) .
Derivatio nominis Named after the village of Weiteveen, municipality of Schoonebeek, in the southeastern part of the province of Drente.
Type section Location map See figure (pdf)
  Well Schoonebeek-197 (pdf)
  Location N 52°38’58.0
E 07°02’34.2
  Depth 1470 to 1358 m
  Length -112 m along hole
  Reference NAM and RGD (1980)
Additional section Location map See figure (pdf)
  Well Ruinen-1 (pdf)
  Location N 52°44’09.8
E 06°27’12.8
  Depth 1114 to 1130 m
  Length 16 m along hole
  Well Exloo Odoorn-2 (pdf)
  Location N 52°54’20.7
E 06°51’57.8
  Depth 1714 to 1718 m
  Length 4 m along hole
  Well De Bente-1 (pdf)
  Location N 52°41’37.8
E 06°46’15.7
  Depth 1237 to 1268 m
  Length 31 m along hole
  Well Oldenzaal-2 (pdf)
  Location N 52°17’18.8
E 06°56’23.8
  Depth 393 to 436 m
  Length 43 m along hole
Definition Group of formations with a predominantly clayey lithology, but also including limestones and evaporites in the lower part. Sands and conglomerates are restricted to the basin fringe. Type well Schoonebeek-197 displays an exceptionally thick succession for Dutch standards. The additional reference sections display the more typical development in the Netherlands.
Upper Boundary The Weiteveen Upper Evaporite is unconformably overlain by the (sands or clays of the) Rijnland Group NAM and RGD (1980) .
Lower Boundary The group rests unconformably on the Altena Group (or older sediments)
Correlation The lithofacies of the Schieland Group (Zurich Formation) in the Central Netherlands and Vlieland Basins (see pdf) resemble those of the Niedersachsen Group. An actual connection of the two realms is not proven, although some scattered occurrences which are tentatively assign-ed to the Zurich Formation on the Groningen High (RGD, in prep.), are very close to the Niedersachsen realm.
Distribution Restricted to the Lower Saxony Basin, which reaches the easternmost parts of the Dutch provinces of Groningen, Drente and Overijssel. NAM and RGD (1980) also report the group in the Central Netherlands Basin and Vlieland Basin (see pdf) , but these occurrences are now placed in the Zurich Formation of the Schieland Group (Delfland Subgroup).
Age Middle Kimmeridgian-Ryazanian/?Early Valanginian NAM and RGD (1980) .
Depositional Setting Judging from the lithofacies associations and palaeontological associations, it was deposited in a fresh- to brack-ish-water lake basin with intermittent marine and hypersaline periods. Hypersaline sediments dominate the Weiteveen Formation
Sequence Stratigraphy The group represents several full sequences (Haq (1988) ’s sequences LZA 4.6 - LZB 1.6, possibly even part of LZB 2.1). Vertical lithofacies changes reflect the different systems tracts.
   
References See References Upper Jurassic/ Lower Cretaceous
       
       
       
   

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