Noordvaarder Member SGSKN


Premise The member is part of the Skylge Formation, Scruff Group. The Noordvaarder Member includes the predominantly sandy part of the former Scruff Argillaceous Member and the underlying difficult to distinguish Basal Sandstone Member. The Basal Sandstone Member is abandoned here. The lateral clayey facies of the former Scruff Argillaceous is attributed to the Lies Member.
Derivatio nominis Named after the village Lies on the Wadden island Terschelling.
Type section Location map See figure (pdf)
  Well F15-02-S1 (pdf)
  Location N 54°14’18.5
E 04°50’32.76
  Depth 3065 to 3276 m
  Length 211 m along hole
Definition Section of moderately to well-sorted, greenish-grey, slightly argillaceous, occasionally calcite cemented, glauconitic sand- stones. Sediments show bioturbation and are locally pyritic, lignitic, and/or characterised by shell debris.
Upper Boundary The upper boundary with the Scruff Spiculite Member is marked by a funnel-shaped GR-log pattern, resulting from the upward decreasing clay content (Van Adrichem Boogaert & Kouwe, 1993; Annex G-5).
Lower Boundary The lower boundary with the Oyster Ground Member (Skylge Formation)  is  marked  by  a  sharp  downward  increase  in  GR readings, although a gentle funnel shape can be observed in the uppermost parts of the Oyster Ground Member in some wells.
Distribution The member is recorded at the fringes of the Central Graben (e.g. blocks B14 and F11) and in the north-western Terschelling Basin, blocks F15, F17, F18 and G16 (see pdf).
Age Sequence 2 sensu Abbink et al. (2006): Early-Middle Volgian, wheatleyensis/ hudlestoni-anguiformis Ammonite zones. The top coincides with the Sequence 2 / Sequence 3 boundary sensu Abbink et al. (2006). The base is associated with the Early Volgian J66 MFS sensu Partington et al. (1993).  Chronostratigraphic  significant  dinoflagellate cysts are: Dichadogonyaulax pannaea, Glossodinium dimorphum (LODs: late Middle Volgian, anguiformis Ammonite Zone), Kleithriasphaeridium porosispinum (FOD: Middle Volgian), Muderongia sp. A in Davey (1982), Rotosphaeropsis thula and Senoniasphaera jurassica (LOD: late Middle Volgian, anguiformis Ammonite Zone).
Depositional Setting The sands were deposited in a shallow marine environment, ranging from offshore to lower shore face.
References See References Upper Jurassic/ Lower Cretaceous

D.K. Munsterman, R.M.C.H. Verreussel, H.F. Mijnlieff, N. Witmans, S. Kerstholt-Boegehold & O.A, Abbink (2012), Revision and update of the Callovian-Ryazanian Stratigraphic Nomenclature in the northern Dutch Offshore, i.e. Central Graben Subgroup and Scruff Group. Netherlands Journal of Geosciences-Geologie en Mijnbouw, 91 (4):555-590.
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