Texel Greensand Member CKTXG


Premise A glauconitic sandstone unit, which is locally found at the base of the Texel Formation, was split off and given member status by NAM and RGD (1980) .
Derivatio nominis Named after the Texel Formation.
Type section Location map See figure (pdf)
  Well De Lier-2 (pdf)
  Location N 51°58’43.9
E 04°13’39.4
  Depth 1110 to 1127 m
  Length 17 m along hole
  Reference NAM and RGD (1980)
Definition Greenish, glauconitic, calcareous sandstones with intercalated marls.
Upper Boundary It is overlain conformably by the Texel Marlstone Member.
Lower Boundary At the southern margin of the West Netherlands Basin the member covers the Rijnland Group in essence conformably
Distribution The member is recognised in the West Netherlands Basin and very locally in the vicinity of Nijmegen.
Age Rather difficult to date biostratigraphically, but its stratigraphic position in the basal part of the Texel Formation suggests an Early or Middle Cenomanian age, depending on the timing of the Cenomanian transgression.
Depositional Setting The greensands are restricted to the areas immediately adjacent to the marine basin margins at the time of deposition of the Texel Formation. They have only been found at the southern fringe of the West Netherlands Basin and on the northern flank of the Maasbommel High. Deposits of this type are formed in inner- to outer-neritic marine settings. An abundance of glauconite indicates frequent reworking and a relatively low rate of deposition. The mineral is commonly found in transgressive sand units.
References See References Upper Cretaceous

Van Adrichem Boogaert, H.A. & Kouwe, W.F.P., 1993-1997. [Stratigraphic unit]. In: Stratigraphic Nomenclature of the Netherlands.
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