Berkel Sand-Claystone Member KNNSC


Premise Definition extended after NAM and RGD (1980) . For the sake of purity the lithological affix has been changed from ’Sand-Shale’ to ’Sand-Claystone’. The Berkel Sandstone Member in the Berkel Schiebroek-2 type section has a more limited vertical extent than originally designated in NAM and RGD (1980) . A reinterpretation is given.
Derivatio nominis Named after the village of Berkel near Rotterdam.
Type section Location map See figure (pdf)
  Well Berkel Schiebroek-2 (pdf)
  Location N 51°57’53.6
E 04°27’10.9
  Depth 1566 to 1695 m
  Length 129 m along hole
  Reference amended
Definition Alternation of fine-grained, argillaceous sandstones and brown-grey silty to sandy claystones. Locally sideritic concretions are present. In the lower part the claystone intervals often are dominant.
Upper Boundary The upper boundary, with the Berkel Sandstone Member, is gradational, but normally taken at the base of the first massive, clean and porous sand.
Lower Boundary The lower boundary, with the Rijswijk Member is sharp, and placed at the top of the massive marine sand.
Distribution West Netherlands Basin, onshore area, especially around the Berkel oil field. The Vlieland Claystone beneath the informal Berkel Clastic mb. can also be referred to as Berkel Sand/Claystone Member. The Vlieland Claystone Formation and the Rijn Member (in part) are lateral equivalents to the north and west. To the south and east (Rotterdam-1, Nieuwerkerk-1) the member grades into the Nieuwerkerk Formation
Age Late Hauterivian to Early Barremian. As this unit is the lateral equivalent of the Berkel Sandstone, its palynological association has a similar composition, and the top especially will be diachronous.
Depositional Setting A shallow-marine (lower-shoreface) depositional environment is concluded for these deposits, associated with the foreshore to upper-shoreface of a coastal-barrier system (Berkel Sandstone Member) prograding to the west and northwest.
Sequence Stratigraphy Sequence LZB 3.2 Transgressive to early Highstand systems tract of sequence LZB 3.3 in the Berkel oil field area. To the north and west, the late Highstand is also devel-oped as Berkel Sand/Claystone Member South of the oil field the member becomes restricted to sequence LZB 3.2, Late Transgressive to Early Highstand systems tract.
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.
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