Code
NUNIFL
Status
Formal (Weerts & Busschers 2003).
Lithological description
Dark greyish brown organoclastic detritus, slightly clayey and mainly of physically disintegrated peat, and detrital gyttja with silt and fine sand (in layers and matrix).
Depositional setting
Freshwater to brackish lagoonal, lacustrine, rich plant growth.
Definition of lower boundary
Commonly sharp contact with peat (Hollandveen Member, Nieuwkoop Formation), clastic tidal deposits (Wormer Member, Naaldwijk Formation) or periglacial sand (Boxtel Formation), locally gradual transition.
Definition of upper boundary
Commonly gradual transition into high-energy clastic tidal deposits (Almere Bed, Naaldwijk Formation), locally sharp contact.
Thickness indication
Up to about 1 m (Menke et al. 1989).
Geographical distribution
Lake IJssel area in the central Netherlands.
Regional correlation
North Sea: not present; UK: not present; GER: not present; BEL: not present.
Age
Meghalayan (late Holocene, Subatlantic).
Type section
Well:
Not yet determined.
Depth (thickness) AH:
Not yet determined.
Origin of name
Former Flevomeer, a lake in the Roman Age.
Previous name(s)
Old and young detrital gyttja (Zagwijn & Van Staalduinen 1975). Formerly part of the Naaldwijk and Westland Formations.
Reviewed by (date)
Wim Dubelaar (2018), Sytze van Heteren (2019).
References
Menke, U., Van de Laar, E., Lenselink, G. 1998. De geologie en bodem van Zuidelijk Flevoland. Flevobericht 415, Directoraat – Generaal Rijkswaterstaat, Directie IJsselmeergebied, Lelystad.
Weerts, H.J.T., Busschers, F.S. 2003. Beschrijving lithostratigrafische eenheid. Nederlands Instituut voor Toegepaste Geowetenschappen TNO. Utrecht.
Zagwijn, W.H., Van Staalduinen, C.J. (red.) 1975, Toelichting bij geologische overzichtskaarten van Nederland. Rijks Geologische Dienst, Haarlem.
Cite as
TNO-GDN ([YEAR]). Flevomeer Bed. In: Stratigraphic Nomenclature of the Netherlands, TNO – Geological Survey of the Netherlands. Accessed on [DATE] from http://acc.dinoloket.nl/en/stratigraphic-nomenclature/flevomeer-bed.