IJsselmonde Claystone Member KNNCA


Premise Definition extended after NAM and RGD (1980) . For the sake of purity the lithological affix has been changed from ’Shale’ to ’Claystone’.
Derivatio nominis Named after the village of IJsselmonde, currently incorporated into Rotterdam.
Type section Location map See figure (pdf)
  Well Ridderkerk-2 (pdf)
  Location 51°53’11.3
E 04°34’17.9
  Depth 1216 to 1234 m
  Length 18 m along hole
  Reference NAM and RGD (1980)
Definition Thin interval of light- to dark-grey, silty to fine-grained sandy, often marly claystone with open-marine to lagoonal fauna and flora. Thin argillaceous sand beds are intercalated.
Upper Boundary The upper boundary, with the IJsselmonde Sandstone Member of the Vlieland Sandstone Formation, is gradual, but placed at the base of the massive sandstone.
Lower Boundary The lower boundary, with the fine-grained paralic (Rodenrijs Claystone Member) and fluvial deposits of the Nieuwerkerk Formation, is sharp.
Distribution South-eastern West Netherlands basin, especially in the Rotterdam area. Towards the north and west (de Lier and Berkel oil fields) this member grades into a thick se-quence of Vlieland Claystone Formation over the Berkel Sandstone Member of the Vlieland Sandstone Formation.
Age Mid-Barremian in age. Characteristic dinocysts recorded are: Pseudoceratium pelliferum, Gardodinium trabeculosum and Odontochitina operculata.
Depositional Setting Palaeogeographical and palaeontological data, and facies association suggest marginal- to open-marine de-position, associated with a barrier-bar complex towards the basin-fringe (south and east, IJsselmonde Sandstone Member of the Vlieland Sandstone Formation).
Sequence Stratigraphy Represents the Late Transgressive to Early Highstand systems tract of sequence LZB 3.4.
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].