Bloemendaal Member SLDBB


Premise Member defined by van Adrichem Boogaert & Kouwe (1993). The former Upper Delfland Formation NAM and RGD (1980) has now been split up into the Bloemendaal and Neomiodon Claystone Members. Originally used inform-ally by Conoco as the ’Upper Delfland Sandstone Member’, which is a reservoir of the Kotter oil field in block K18b.
Derivatio nominis Named after the town of Bloemendaal in the south of the Dutch province of Noord-Holland. It lies approximately on strike projection from the offshore type locality.
Type section Location map See figure (pdf)
  Well K18-Kotter-07A (pdf)
  Location N 53°04’56.1
E 03°57’56.8
  Depth 1987 to 2115 m
  Length 128 m along hole
  Reference 123 m TVD
Additional section Location map See figure (pdf)
  Well K18-02-A (pdf)
  Location N 53°05’12.0
E 03°57’54.4
  Depth 2024 to 2143 m
  Length 119 m along hole
Definition Sequence of white to grey, fine- to medium-grained sandstones interbedded with siltstones and claystones, dispersed coal particles are common.
Upper Boundary The unit is (un-)conformably overlain by the Neomiodon Claystone Member, or it is unconformably overlain by the Helm Member or Vlieland Sandstone Formation. The sequence displays considerable lateral facies variation, mainly expressed by the sand content. Locally, this member may be a lateral equivalent of part of the Neomiodon Claystone Member
Lower Boundary The member conformably overlies the flood-plain fines of the Driehuis Mottled Claystone Member or the Fourteens Claystone Member
Distribution Restricted to those parts of the Broad Fourteens Basin where Late Kimmerian truncation is limited (P03-Q01-K18-K15).
Age Late Portlandian - Ryazanian. Floras are dominated by sporomorphs, Celyphus rallus and Botryococcus spp., indicating a predominantly non-marine, fresh-water deposition. However, some marine incursions with Microdinium opacum have been encountered.
Depositional Setting The member reflects a lower-coastal-plain setting. The sandstones were deposited by fluvial channels. Marine influence was minor during the deposition of this member, but still present.
Sequence Stratigraphy The stratigraphic age and lithofacies of the deposits suggest formation of this member to have covered the Late Highstand of sequence LZB 1.5a and most of LZB 1.5b. In P03 and K15 the member incorporates the full sequences LZB 1.5a and LZB 1.5b. Locally, deposition of this member persisted into the Lowstand systems tract of LZB 1.6.
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].