Formal (NAM & RGD 1980). Amended (Van Adrichem Boogaert & Kouwe 1993).
Light- to medium-grey sandstones with a very fine to medium and locally gravelly grain size; mica, lignitic matter and siderite concretions are common. Locally, lignitic claystone beds are present, especially near the base. In blocks Q11-Q14 very fine- to fine-grained, bioturbated sandstones with considerable intercalations of claystones predominate.
Coastal sands, majority deposited as basal transgressive sands, which were intensely reworked by bioturbation, waves and storms, or as stacked relicts of prograding coastal-barrier systems.
Definition of lower boundary
Conformably overlies the lower-coastal-plain to lagoonal deposits of the Rodenrijs Member.
Definition of upper boundary
Well-defined at the top of the marine sandstone body.
UK: Valhall Formation; GER: ~Minden-Braunschweig-Gruppe; BEL: -.
middle - late Hauterivian.
Origin of name
Named after the village of Rijswijk in the province of Zuid-Holland.
Originally Rijswijk Sandstone Member.
NAM & RGD 1980. Stratigraphic nomenclature of The Netherlands. Verhandelingen van het Koninklijk Nederlands Geologisch Mijnbouwkundig Genootschap 32, 77 p.
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..
TNO-GDN ([YEAR]). Rijswijk Member. In: Stratigraphic Nomenclature of the Netherlands, TNO – Geological Survey of the Netherlands. Accessed on [DATE] from https://www.dinoloket.nl/en/stratigraphic-nomenclature/rijswijk-member.