Formal (NAM & RGD 1980). Amended (Van Adrichem Boogaert & Kouwe 1993).
Massive sandstone, light-grey, very fine- to medium-grained, rarely up to pebbly, lignitic, locally glauconitic, locally with sideritic concretions, well bedded. Especially in the upper part of the member calcareous cemented beds are common; locally shells and shell fragments are present. Thin intercalated claystone beds are frequent. Often a 5-10 m thick lignitic claystone bed is present in this member.
Lower part shallow-marine (shoreface-backbarrier) environment. The intercalated claystones are considered as back-barrier lagoonal deposits, with intercalated tidal deposits. The upper part reworked and bioturbated shallow-marine transgressive sands.
Definition of lower boundary
Taken at the base of the first massive sand of the IJsselmonde Sandstone Member on top of the IJsselmonde Claystone Member.
Definition of upper boundary
With the Eemhaven Member of the Vlieland Claystone Formation is sharp.
UK: Valhall Formation; GER: ~Minden-Braunschweig-Gruppe; BEL: -.
Origin of name
Named after the former village of IJsselmonde, currently incorporated into Rotterdam.
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]). IJsselmonde Sandstone Member. In: Stratigraphic Nomenclature of the Netherlands, TNO – Geological Survey of the Netherlands. Accessed on [DATE] from https://www.dinoloket.nl/en/stratigraphic-nomenclature/ijsselmonde-sandstone-member.