Rijn Member

KNNSI

Formal (Van Adrichem Boogaert & Kouwe 1993).

White to greyish-orange sandstone, very fine-, rarely up to very coarse-grained, slightly calcareous, argillaceous, locally with abundant glauconite and mollusc shells. In general the interval is intensely bioturbated. Few intercalated thin beds of olive-grey, silty mudstone. On GR logs the member appears as a thick sequence with relatively high readings, resulting from the high clay- and glauconite-content. The member shows considerable variations in thickness.

Offshore shoal-bars and/or transgressive sheet-sands.

Unconformably rests upon Triassic or Lower/Middle Jurassic sediments, or upon the lignitic heterolithics of the Delfland Subgroup (Nieuwerkerk or Breeveertien formations).

Upper boundary is well-defined at the top of the marine sandstone body.

100 - 200 m.

UK: Valhall Formation; GER: ~Minden-Braunschweig-Gruppe; BEL: -.

middle - late Hauterivian.

Named after the Rijn oil field, which produces from this interval in block P15.

None.

Sander Houben (2017).

Van Adrichem Boogaert, H.A. & Kouwe, W.F.P. 1993. Stratigraphic nomenclature of The Netherlands; revision and update by RGD and NOGEPA, Section G, Upper Jurassic and Lower Cretaceous. Mededelingen Rijks Geologische Dienst, 50, 1-80..