Patch Formation

Formal (Van Adrichem Boogaert & Kouwe 1994).
Lithological description

Grey and green-grey, silty claystones containing a few thin sandstone beds and some thin, brown, intercalated dolomite beds.

Depositional setting

Floodplain and limnic depositional environment.

Definition of lower boundary

Overlies the Caledonian basement unconformably.

Definition of upper boundary

Overlain conformably by the sandstone-dominated Buchan Formation.

Thickness indication
Up to 296 m.
Geographical distribution
Regional correlation
UK: ?; GER: ?; BEL: ?
Givetian - Frasnian.
Depth (thickness) AH:
2717 - 3013 m (296 m)
Origin of name
Named after the South West Patch, a shoal in the central North Sea.
Previous name(s)
Reviewed by (date)
Tom van Hooff (2017).
Van Adrichem Boogaert, H.A. & Kouwe, W.F.P. 1994. Stratigraphic nomenclature of The Netherlands; revision and update by RGD and NOGEPA, Section B, Devonian and Dinantian. Mededelingen Rijks Geologische Dienst, 50, 1-20.
Cite as
TNO-GDN ([YEAR]). Patch Formation. In: Stratigraphic Nomenclature of the Netherlands, TNO – Geological Survey of the Netherlands. Accessed on [DATE] from