Schoorl Member

NUNASC

Formal (Weerts 2003).

Light yellow to grey very fine to fine sand, calcareous, locally shelly. Thin intercalated palaeosols or peat layers at different levels. Common large-scale cross-bedding.

Coastal dune (aeolian), interdune swale (pond).

Base may be marked by shells. Sharp but commonly conformable contact with beach sand (Zandvoort Member, Naaldwijk Formation). Inland, unconformable contact with clastic tidal deposits (Wormer and Walcheren Members, Naaldwijk Formation) or with peat (Hollandveen Member, Nieuwkoop Formation).

Commonly exposed at the surface. Inland, partly overlain by clastic tidal deposits (Wormer and Walcheren Members, Naaldwijk Formation) or by peat (Hollandveen Member, Nieuwkoop Formation).

Up to about 50 m (where dunes are highest, near Schoorl).

Up to about 5-km-wide belt along the Dutch North Sea coast.

North Sea: not present; UK: British Coastal Deposits Group with the North Denes Formation (McMillan et al. 2011); GER: Küstenholozän (Barckhausen et al. 1977; Preuss, 1979); BEL: De Panne Member, Vlaanderen Formation (Gullentops et al. 2001).

Holocene (Northgrippian - Meghalayan).

Named after the village of Schoorl, northwest of Amsterdam.

Younger Dune Deposits (Doppert et al. 1975).

Wim Dubelaar (2018), Sytze van Heteren (2019).

Barckhausen, J., Preuss, H., Streif, H.-J. 1977. Ein lithologisches Ordnungsprinzip für das Küstenholozän und seine Darstellung in Form van Profiltypen. Geologisches Jahrbuch Reihe A 44, 45-77.

Doppert, J.W.Chr., Ruegg, G.H.J., Van Staalduinen, C.J., Zagwijn, W.H., Zandstra, J.G. 1975. Formaties van het Kwartair en Boven-Tertiair in Nederland. In: Zagwijn, W.H., Van Staalduinen, C.J. (eds.): Toelichting bij geologische overzichtskaarten van Nederland. Rijks Geologische Dienst, Haarlem, 11-56.

Gullentops, F., Bogemans, F., De Moor, G., Paulissen, E., Pissart, A. 2001. Quaternary lithostratigraphic units (Belgium). In: Bultynck, P., Dejonghe, L. (eds.), Guide to a revised lithostratigraphic scale of Belgium, Geologica Belgica, 4/1-2, 153-164.

McMillan, A.A., Hamblin, R.J.O., Merritt, J.W. 2011. A lithostratigraphical framework for onshore Quaternary and Neogene (Tertiary) superficial deposits of Great Britain and the Isle of Man. British Geological Survey Research Report, RR/10/03, 343 p.

Preuss, H. 1979. Die Holozäne Entwicklung der Nordseeküste im Gebiet der östlichen Wesermarsch. Geologisches Jahrbuch Reihe A 53, 3-84.

Weerts, H.J.T. 2003. Beschrijving lithostratigrafische eenheid. Nederlands Instituut voor Toegepaste Geowetenschappen TNO. Utrecht.