Upper Germanic Trias Group RN

 

Premise The group was formally introduced in NAM and RGD (1980) . In the present classification it embraces the former Upper Bunter Formation and the uppermost part of the Middle Bunter Formation of NAM and RGD (1980) .
Derivatio nominis The name ‘Germanic Trias’ has been derived from the German stratigraphic nomenclature, where it refers to the sedimentary sequence between the evaporitic Zechstein Group and the marine Altena Group. The prefix ‘Upper’ applies to that part of the Germanic Trias which occurs above the Base Solling Unconformity (= Spathian Unconformity).
Type section Location map See figure (pdf)
  Well L02-01 (pdf)
  Location N 53°57’14.0
E 04°30’47.0
  Depth 2808 to 3970 m
  Length 1162 m along hole
  Reference (amended after NAM and RGD (1980) )
Definition Group of formations composed of varicoloured, silty claystones, evaporites, carbonates and sandstones.
Upper Boundary The group comprises the entire sequence between the Lower Germanic Trias Group and the Altena Group. Its lower as well as its upper boundary are formed by unconformities. The upper boundary at the base of the Sleen Formation.
Lower Boundary The group comprises the entire sequence between the Lower Germanic Trias Group and the Altena Group. Its lower as well as its upper boundary are formed by unconformities. The lower boundary has been placed at the base of the Solling Formation.
Distribution The group is present in the Mesozoic basins and extends onto some platform areas around these basins. On most Mesozoic highs, the group is absent owing to later erosion.
Age Latest Scythian to Norian.
Depositional Setting The group comprises a series of sediments deposited in alternating shallow, restricted-marine, inland-playa lake and floodplain settings.
Subdivision Four formations have been recognized in the Upper Germanic Trias Group, viz.:
  RN Upper Germanic Trias Group
  RNKP Keuper Formation
  RNMU Muschelkalk Formation
  RNRO Röt Formation
  RNSO Solling Formation
  The Solling Formation was formerly considered a part of the R�ormation in NAM and RGD (1980) . Here it is defined as a separate formation and the Röt Formation has been redefined accordingly.
References See References Triassic

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