Hardegsen Formation

Formal (NAM & RGD 1980). Amended (Van Adrichem Boogaert & Kouwe 1994).
Lithological description

Several stacked alternations of off-white to pink sandstones and red claystones. Arkosic sandstones without claystone intercalations in the southern Netherlands onshore and offshore.

Depositional setting

Lacustrine conditions, whereas clastic (fluvial) deposition was mainly confined to the basin margins.

Definition of lower boundary

Placed at the base of the first sandstone bed above the Detfurth Formation.

Definition of upper boundary

Placed at the base of the Upper Germanic Trias Group (Hardegsen Unconformity).

Thickness indication
Up to 200 m in the Ems Low and Dutch Central Graben. Up to 70 m in the Broad Fourteens Basin, the West Netherlands Basin and the Roer Valley Graben.
Geographical distribution
Regional correlation
UK: Bunter Sandstone Formation; GER: Hardegsen Formation; BEL: Hardegsen Formation.
Depth (thickness) AH:
3970 - 4009 m (39 m)
Depth (thickness) AH:
2736 - 2748 m (12 m)
Depth (thickness) AH:
1387 - 1401 m (14 m)
Depth (thickness) AH:
2535 - 2553 m (18 m)
Origin of name
Name derived from the German stratigraphic nomenclature.
Previous name(s)
Reviewed by (date)
Johan ten Veen (2017).
NAM & RGD 1980. Stratigraphic nomenclature of The Netherlands. Verhandelingen van het Koninklijk Nederlands Geologisch Mijnbouwkundig Genootschap 32, 77 p.
Van Adrichem Boogaert, H.A. & Kouwe, W.F.P. 1994. Stratigraphic nomenclature of The Netherlands; revision and update by RGD and NOGEPA, Section E, Triassic. Mededelingen Rijks Geologische Dienst, 50, 1-28.
Cite as
TNO-GDN ([YEAR]). Hardegsen Formation. In: Stratigraphic Nomenclature of the Netherlands, TNO – Geological Survey of the Netherlands. Accessed on [DATE] from https://www.dinoloket.nl/en/stratigraphic-nomenclature/hardegsen-formation.