Geul Subgroup

Formal (Van Adrichem Boogaert & Kouwe 1995).
Lithological description

Comprising cyclic successions of predominantly fine-grained siliciclastic deposits devoid of coal seams. In the northwestern offshore the subgroup locally includes a sandstone-dominated succession.

Depositional setting

Delta sedimentation in a lacustrine basin with frequent marine incursions.
Long-term regression from north to south.

Definition of lower boundary

Not yet defined.

Definition of upper boundary

Not yet defined.

Thickness indication
Up to 1335 m in WSK-01.
Geographical distribution
Regional correlation
UK: Millstone Grit Group; GER: Ruhr-Group?; BEL: Belgian Coal Measures Group.
Serpukhovian - Bashkirian.
Depth (thickness) AH:
2438 - 4303 m (1865 m)
Origin of name
Named after the small river Geul in the south of the province of Limburg and adjoining Belgium, where some outcrops of this subgroup can be found.
Previous name(s)
Reviewed by (date)
Tom van Hoof (2017).
Van Adrichem Boogaert, H.A. & Kouwe, W.F.P. 1995. Stratigraphic nomenclature of The Netherlands, revision and update by RGD and NOGEPA, Section C, Silesian. Mededelingen Rijks Geologische Dienst, 50, 1-40.
Cite as
TNO-GDN ([YEAR]). Geul Subgroup. In: Stratigraphic Nomenclature of the Netherlands, TNO – Geological Survey of the Netherlands. Accessed on [DATE] from