Lower Slochteren Member

Code
ROSLL
Status
Formal (Van Adrichem Boogaert 1976). Amended (NAM & RGD 1980) & (Van Adrichem Boogaert & Kouwe 1994).
Lithological description

Sandstone-dominated succession, locally containing a considerable proportion of interbedded conglomerates. Sandstones can be either free of matrix, showing parallel lamination or large-scale cross-stratification and bimodal sorting, or contain significant amounts of argillaceous matrix, in which case they are moderately to poorly sorted, often trough-cross-bedded, with frequent fluidisation features and (intra- or extraclastic) pebbles.

Depositional setting

Aeolian and fluvial.

Definition of lower boundary

Unconformably overlies the Limburg Group (or possibly volcanics of the Lower Rotliegend Group). In the area of Ameland and Terschelling but also in the northern pinchout/feather-edge it may conformably overly a tongue of the Silverpit Formation (Hollum Member).

Definition of upper boundary

Overlain by the red-brown claystones of the Ameland Member of the Silverpit Formation in the transition zone. Towards the basin centre the Lower Slochteren Member is overlain conformably by the Lower Silverpit Member.

Thickness indication
Up to 177 m.
Geographical distribution
Regional correlation
UK: leman Formation; GER: Dethlingen Formation & Hannover Formation; BEL: -.
Age
Capitanian - Wuchiapingian.
Holostratotype
Well:
Depth (thickness) AH:
3058 - 3167 m (109 m)
Hypostratotype
Well:
Depth (thickness) AH:
3634.5 - 3685 m (50.5 m)
Origin of name
The name reflects the stratigraphic position of the member, stratigraphically below the Ameland Member of the Silverpit Formation.
Previous name(s)
None.
Reviewed by (date)
Harmen Mijnlieff (2017).
References
NAM & RGD 1980. Stratigraphic nomenclature of The Netherlands. Verhandelingen van het Koninklijk Nederlands Geologisch Mijnbouwkundig Genootschap 32, 77 p.
Van Adrichem Boogaert, H.A. 1976. Outline of the Rotliegend (Lower Permian) in The Netherlands. In: Falke, H. (ed.), The continental Permian in Central, West, and South Europe, 23-37.
Van Adrichem Boogaert, H.A. & Kouwe, W.F.P. 1994. Stratigraphic nomenclature of The Netherlands; revision and update by RGD and NOGEPA, Section D, Permian. Mededelingen Rijks Geologische Dienst, 50, 1-42.
Cite as
TNO-GDN ([YEAR]). Lower Slochteren Member. In: Stratigraphic Nomenclature of the Netherlands, TNO – Geological Survey of the Netherlands. Accessed on [DATE] from http://acc.dinoloket.nl/en/stratigraphic-nomenclature/lower-slochteren-member.