Formal (NAM & RGD 1980). Amended (Van Adrichem Boogaert & Kouwe 1993).
Alternation of thin-bedded, very fine- to fine-grained argillaceous sandstones, generally glauconitic and lignitic, and sandy claystones, commonly glauconitic and with shell fragments and frequent bioturbation. Siderite concretions are common.
Coastal to outer-neritic marine setting in a prograding coastal system.
Definition of lower boundary
Boundary with the Eemhaven Member or the main Vlieland Claystone Formation is a gradual transition. On the southern fringe of the West Netherlands Basin, the Eemhaven Member can be absent, and the member rests conformably upon the coastal/fluvial-plain deposits of the Nieuwerkerk Formation.
Definition of upper boundary
(Mildly un-)conformable upper boundary with the Lower Holland Marl Member is well-defined at the top of the sandstone.
UK: Valhall Formation; GER: ~Minden-Braunschweig-Gruppe; BEL: -.
late Barremian - early Aptian.
Origin of name
Named after the village De Lier in the Dutch province of Zuid-Holland.
Originally De Lier Sandstone Member, since the lithological affix in the original definition of this member is inconclusive, it has been deleted.
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]). De Lier Member. In: Stratigraphic Nomenclature of the Netherlands, TNO – Geological Survey of the Netherlands. Accessed on [DATE] from https://www.dinoloket.nl/en/stratigraphic-nomenclature/de-lier-member.