Vlieland Marl Member KNNCK

 

Premise Member defined by van Adrichem Boogaert & Kouwe (1993).
Derivatio nominis Named after the Dutch Wadden island of Vlieland.
Type section Location map See figure (pdf)
  Well E18-02 (pdf)
  Location N 54°09’05.1
E 03°46’40.7
  Depth 2569 to 2638 m
  Length 69 m along hole
Definition A white to light-grey marl with a very calcareous upper part and a more argillaceous lower part.
Upper Boundary The upper boundary with the Lower Holland Marl Member is marked by a sharp transition into red-brown claystones.
Lower Boundary The lower boundary is marked by a transition into dark brownish-grey to grey shaly claystones of the main Vlieland Claystone Formation, which also constitutes a lateral equivalent.
Distribution The member’s distribution coincides with the Central Graben and Step Graben area.
Age Dated as Late Hauterivian to earliest(?) Barremian. Dinaflagellate forms are: Trichodinium speetonense (Barremian) and Kiokansium vetusculum, Ophiobolus sp.A Davey, Cribroperidinium confossum, Nelchinopsis kostromiensis (Hauterivian). The most common foraminifera in the type section are Gavelinella barremiana, Lenticulina ouachensis, L. schreiteri, L. bettenstaedti, Co-norotalites bartensteini, C. intercedens, Gaudryinella sherlocki, Wellmanella antiqua, Margulinopsis gracilissima, Epistomina ornata, Gaudryina richteri, Verneuillinoi-des inaequalis; of the ostracods Protocythere triplicata is of importance.
Depositional Setting The very low content of clastic material indicates that this member was deposited in a fairly deep basin-centre position, where sedimentation was dominated by settling of pelagic bioclastics.
Sequence Stratigraphy On the basis of its age, the member represents the full sequences LZB 2.4-3.5.
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].