Scheemda Formation NUSA

 

Derivatio nominis Named after the municipality of Scheemda in the province of Groningen.
Type section Location map See figure (pdf)
  Well Zuidlaren 12E/84
  Location N 53°05'28.52
E 06°42'11.52
  Depth 91.6 to 151.1 m
  Length 59.5 m along hole
  Reference below surface Doppert et al (1975)
Additional section Location map See figure (pdf)
  Well Onnerpolder 12E/16
  Location N 53°08'28.6
E 06°39' 52.8
  Depth 114.5 to 165 m
  Length 50.5 m along hole
  Reference below surface Doppert et al (1975)
Definition Complex lithological unit consisting predominantly of sands. Locally, it comprises gravels, brown-coal beds and clay beds as well. The sands and gravels are extremely rich in translucent quartz. In fine-grained parts of the sands a minor amount of glauconite is often present.
Upper Boundary The Scheemda Formation lies between the marine beds of the Breda Formation and non-marine Quaternary deposits.
Lower Boundary The Scheemda Formation lies between the marine beds of the Breda Formation and non-marine Quaternary deposits
Distribution Restricted to the northeastern Netherlands, notably in the provinces of Groningen, Drenthe and the northern part of Overijssel. In the eastern part of the province of Gelderland, the Scheemda Formation interdigitates with the Kieseloölite Formation. It intertongues with the uppermost part of the Breda Formation and with the Oosterhout Formation.
Age Pliocene, possibly partially also Late Miocene.
Depositional Setting Mainly fluvial unit, deposited by ancient rivers flowing out of the Baltic region and northern Germany. Sedimentary structures, however, in places indicate an estuarine or shallow-marine environment.
Subdivision  
  Two members can be distinguished in the Scheemda Formation:
  NUSA Scheemda Formation
  Weerselo Member NUSAW
  Lievelde Member NUSAL
  The Lievelde Member was defined by van den Bosch et al (1975) as a succession of very fine-grained to medium fine-grained sands, locally with minor gravel, and some clay streaks in the lowermost part. In the Twente area these are overlain disconformably by the Weerselo Member van den Berg and Gaemers (1993) , which consists of medium fine- to very coarse-grained sands with occasional stringers of gravel.
References See References Tertiary

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