Breeveertien Formation

Code
SLDB
Status
Formal (Van Adrichem Boogaert & Kouwe 1993).
Lithological description

Predominantly grey-brown, carbonaceous, but also variegated or red, silty claystones, fine- to medium-grained sandstones with bed thicknesses up to several metres, and coarse-grained, thick-bedded sandstones. Coal beds are virtually absent. Dispersed lignitic matter, siderite spherulites and concretions are common. Cored sections show extensive mottling of the variegated claystones. Locally, intercalated calcareous claystones and a few nodular evaporitic beds occur. Sands occur in sheets, isolated channels, or stacked valley fills.

Depositional setting

Sands: stacked and isolated channels, and as lacustrine-deltas and crevasse-splays in a flood-plain setting. Fines: lakes and on flood-plains. Mottling and concretions: fluctuating groundwater-tables and long periods of non-deposition.

Definition of lower boundary

Unconformably overlies the Altena Group in the central part of the Broad Fourteens Basin. Along the margins it rests on deposits of Triassic or older age.

Definition of upper boundary

If a Late Kimmerian II unconformity is developed the Rijnland Group unconformably overlies this formation. At other localities, the Vlieland Sandstone Formation and Breeveertien Formation partially interfinger. In inverted settings the formation is unconformably covered by the Chalk Group or Lower North Sea Group.

Thickness indication
Up to 642 m.
Geographical distribution
Regional correlation
The Breeveertien Formation partially interfingers with the Kotter Member and Helder Member of Vlieland Sandstone Formation, and Helm Member of Breeveertien Formation.
UK: Humber Group; GER: ?; BEL: -.
Age
early Kimmeridgian - Valanginian.
Holostratotype
Depth (thickness) AH:
1559 - 2270 m (711 m)
Origin of name
Named after the Breeveertien (Broad Fourteens) fishing grounds, where the type area is situated.
Previous name(s)
None.
Reviewed by (date)
Sander Houben (2017).
References
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]). Breeveertien Formation. In: Stratigraphic Nomenclature of the Netherlands, TNO – Geological Survey of the Netherlands. Accessed on [DATE] from http://www.dinoloket.nl/en/stratigraphic-nomenclature/breeveertien-formation.