Formal (Van Adrichem Boogaert & Kouwe 1993).
Light-grey massive sandstone sequence, fine to coarse-gravelly, fining upward, lignitic.
Distributary-channels in a lower-coastal-plain setting.
Definition of lower boundary
Conformably overlie the flood-plain deposits of the Alblasserdam Member. In the type section the unit unconformably overlies the Aalburg Formation.
Definition of upper boundary
Conformably overlain by the organic rich claystones of the Rodenrijs Member.
Generally less than 145 m, but up to 320 m in Q13-04.
UK: Cromer Knoll Group - Humber Group; GER: ?; BEL: -.
Origin of name
Named after the city of Delft.
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]). Delft 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/delft-sandstone-member.