Spijkenisse Greensand Member KNGLS

 

Premise Member defined by van Adrichem Boogaert & Kouwe (1993).
Derivatio nominis Named after the Dutch town of Spijkenisse, where the type well is situated.
Type section Location map See figure (pdf)
  Well Spijkenisse West-1 (pdf)
  Location N 51°50’29.0
E 04°18’39.8
  Depth 2025 to 2093 m
  Length 68 m along hole
Definition Mainly coarse-grained, greenish grey, glauconitic sandstones, locally with argillaceous matrix or calcareous cementation.
Upper Boundary The Spijkenisse Greensand Member is mildly unconformably overlain by the Texel Greensand Member (Chalk Group), which is recognised by a sharp upward increase in GR-log readings in the type section (more glauconite), but more commonly by a higher acoustic velocity.
Lower Boundary The basal contact with the glauconitic marls of the Lower Holland Marl Member below is recognised on log character.
Distribution Restricted to a narrow WNW-ESE trending belt along the southernmost margin of the West Netherlands Basin. The Holland Greensand Member and the Middle Holland Claystone Member (and the Upper Holland Marl Member?) possibly are lateral equivalents to the north, recognisable by their thicker and more argillaceous development.
Age As yet relatively undated, but correlation with the basinward equivalents suggests an Albian age (see Fig. G.6).
Depositional Setting The lithological character, including the abundance of glauconite suggests a shallow, open-marine deposition.
Sequence Stratigraphy At least full sequences UZA 1.1 and UZA 1.2, up to the Transgressive system tract of UZA 1.3. Possibly even up to UZA 2.1 and down to LZB 4.1 in more marginal settings.
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].