Solling Formation

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

Basal, grey sandstone and overlying red claystone unit.

Depositional setting

Aeolian and braided-river deposits and lacustrine settings.

Definition of lower boundary

Defined by the Hardegsen Unconformity, the Solling Formation unconformably overlies the Main Buntsandstein Subgroup, or in areas of severe pre-Solling erosion, the Lower Buntsandstein Formation. The unconformity is usually marked by a well-cemented, basal sandstone, which shows a more pronounced response on wireline logs than the sandstones of the underlying Main Buntsandstein Subgroup.

Definition of upper boundary

Placed at the base of the Main Röt Evaporite Member. In the basin-fringe area, in the absence of the Main Röt Evaporite Member, this boundary may be difficult to identify.

Thickness indication
10 to 125 m.
Geographical distribution
Regional correlation
UK: ?; GER: Solling Formation; BEL: Solling Formation.
latest Olenekian - earliest Anisian.
Depth (thickness) AH:
3964 - 3970 m (6 m)
Depth (thickness) AH:
2513 - 2515 m (2 m)
Depth (thickness) AH:
2532 - 2535 m (3 m)
Origin of name
Formation name derived from the German stratigraphic nomenclature.
Previous name(s)
Reviewed by (date)
Johan ten Veen (2017).
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]). Solling Formation. In: Stratigraphic Nomenclature of the Netherlands, TNO – Geological Survey of the Netherlands. Accessed on [DATE] from