Holland Greensand Member KNGLG

 

Derivatio nominis Named after the Dutch province of Zuid-Holland.
Type section Location map See figure (pdf)
  Well De Lier-2 (pdf)
  Location N 51°58’43.9
E 04°13’39.4
  Depth 1358 to 1408 m
  Length 50 m along hole
  Reference NAM and RGD (1980)
Additional section Location map See figure (pdf)
  Well Pernis-1 (pdf)
  Location N 51°53’29.0
E 04°23’56.3
  Depth 1655 to 1824 m
  Length 169 m along hole
  Reference also known as Pernis-1A
Definition Alternation of greenish grey, very glauconitic, very fine- to fine-grained, argillaceous sandstones, locally silt-stones with calcareous or sideritic cement, and olive-grey claystones. Apart from the glauconite, the member is characterised by its intensely bioturbated nature.
Upper Boundary The more or less conformable contacts with the Lower Holland Marl Member below and the Middle Holland Clay-stone Member above are easily recognised on log character. The upper boundary of the Holland Greensand Member is formed by a gradual transgression, and therefore the Middle Holland Claystone Member is considered a partial lateral equivalent.
Lower Boundary The more or less conformable contacts with the Lower Holland Marl Member below and the Middle Holland Clay-stone Member above are easily recognised on log character
Distribution Restricted to the southern West Netherlands Basin and eastern Broad Fourteens Basin (Q01-L16). Shaling out over a short distance towards the north. The lower part of the Spijkenisse Greensand Member may be a basin fringe equivalent.
Age Microfaunal data indicate an Early Albian age NAM and RGD (1980) . Locally possibly also Late(?) Aptian and Middle Albian.
Depositional Setting Middle- to outer-neritic setting. Abundant glauconite indicates intense wave- and/or storm-winnowing prior to deposition. The Spijkenisse Greensand Member may be a more proximal basin-fringe equivalent, while the Middle Holland Claystone Member is an open-marine equivalent.
Sequence Stratigraphy Full sequence UZA 1.1, and Lowstand - Early Transgressive systems tracts of Haq (1988) ’s sequence UZA 1.2, but may locally extend further up and/or down.
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].