Berkel Sandstone Member

KNNSB

Formal (NAM & RGD 1980). Amended (Van Adrichem Boogaert & Kouwe 1993).

Sandstone, light-grey, very fine- to fine- and medium- to coarse-grained, locally gravelly, lignitic, locally glauconitic or with sideritic concretions. Especially in the upper part of the member calcareous cemented beds are common; locally shells and shell fragments are present. Further into the basin the member becomes increasingly calcareous.

Shallow-marine depositional setting for the lower part of these deposits. The upper part was deposited as reworked and bioturbated shallow-marine transgressive sands.

With the Berkel Sand-Claystone Member, is gradational, but normally placed at the base of the first massive, clean and porous sand.

With the Vlieland Claystone Formation generally is sharp.

50 - 100 m.

UK: Valhall Formation; GER: ~Minden-Braunschweig-Gruppe; BEL: -.

late Hauterivian - middle Barremian.

Named after the village of Berkel near Rotterdam.

None.

Sander Houben (2017).

NAM & RGD 1980. Stratigraphic nomenclature of The Netherlands. Verhandelingen van het Koninklijk Nederlands Geologisch Mijnbouwkundig Genootschap 32, 77 p.

Van Adrichem Boogaert, H.A. & Kouwe, W.F.P. 1993. Stratigraphic nomenclature of The Netherlands; revision and update by RGD and NOGEPA, Section G, Upper Jurassic and Lower Cretaceous. Mededelingen Rijks Geologische Dienst, 50, 1-80..