Code
NMRURA
Status
Formal (Van Adrichem Boogaert & Kouwe 1997).
Lithological description
Sand, very fine to extremely coarse-grained, dark grey with glauconite, silty clay and loam. For details the reader is referred to Van den Bosch et al. (1975).
Depositional setting
Marine.
Definition of lower boundary
Not yet determined.
Definition of upper boundary
Not yet determined.
Thickness indication
Not yet determined.
Geographical distribution
Not yet determined.
Regional correlation
The Ratum Member corresponds with the Berg Member.
Age
Rupelian.
Holostratotype
Well:
Not yet determined.
Depth (thickness) AH:
Not yet determined.
Comments:
New reference section: see discussion in Van Den Bosch (2015, p. 36).
Origin of name
Named after the hamlet of Ratum, near Winterswijk.
Previous name(s)
None.
Reviewed by (date)
Dirk Munsterman (2018).
References
Van den Bosch, M., Cadée, M.C., Janssen, A.W. 1975. Lithostratigraphical and biostratigraphical subdivision of Tertiary deposits (Oligocene - Pliocene) in the Winterswijk-Almelo region (eastern part of The Netherlands). Scripta Geologica 29, 1-167.
Van Adrichem Boogaert, H.A. & Kouwe, W.F.P. 1997. Stratigraphic nomenclature of The Netherlands, revision and update by RGD and NOGEPA, Section I, Tertiary. Mededelingen Rijks Geologische Dienst, 50, 1-39.
Van den Bosch, M. 2015. Lithostratigrafie van het Oligoceen in de regio Almelo-Winterswijk, Oost Nederland, 164 p.
Cite as
TNO-GDN ([YEAR]). Ratum Member. In: Stratigraphic Nomenclature of the Netherlands, TNO – Geological Survey of the Netherlands. Accessed on [DATE] from https://www.dinoloket.nl/en/stratigraphic-nomenclature/ratum-member.