main Friese Front member

Informal (Van Adrichem Boogaert & Kouwe 1993).
Lithological description

Claystone, siltstone, sandstone and some minor coal.
Strata between the Rifgronden and Oyster Ground members are assigned to the undifferentiated Friese Front Formation and indicated informally as ‘main Friese Front member’.

Depositional setting


Definition of lower boundary

Not yet determined.

Definition of upper boundary

Not yet determined.

Thickness indication
Up to 324 m.
Geographical distribution
Not yet determined.
Regional correlation
Not yet determined.
late Callovian - early Tithonian.
Type section
Not yet determined.
Depth (thickness) AH:
Not yet determined.
Origin of name
Named after the Friese Front, a fisherman’s name for a shallower area north of the Wadden Islands, near the type locality.
Previous name(s)
Reviewed by (date)
Geert-Jan Vis (2019).
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..
Cite as
TNO-GDN ([YEAR]). main Friese Front member. In: Stratigraphic Nomenclature of the Netherlands, TNO – Geological Survey of the Netherlands. Accessed on [DATE] from