Code
NUBRAA
Status
Formal (Van den Bosch et al. 1975).
Lithologische beschrijving
Brownish grey to black clay, very silty to sandy, calcareous. Brownish grey to black sand, shelly and glauconitic.
Afzettingsmilieu
Warm delta base, delta front (Van den Berg et al. 2000).
Definitie ondergrens
Unconformable contact (Mid-Miocene Unconformity) with shallow-marine clay and sand (Rupel Formation and locally Veldhoven Formation).
Definitie bovengrens
Gradual transition into non-calcareous and micaceous shallow-marine clay and sand (Eibergen Member, Breda Formation).
Dikte indicatie
Up to about 20 m.
Geografische verbreiding
Restricted to the eastern Netherlands, close to the German border (Van den Bosch et al. 1975).
Regionale correlatie
North Sea: not present; UK: not present; GER: ?; BEL: not present.
Ouderdom
middle Miocene.
Type section
Well:
Not yet determined.
Depth (thickness) AH:
Not yet determined.
Oorsprong naam
Named after the village of Aalten in the eastern Netherlands.
Vorige benaming(en)
Aalten Deposits. Subdivided into the Miste Bed and the Stemerdink Bed (Van den Bosch et al. 1975).
Gereviewed door (datum)
Dirk Munsterman (2018), Sytze van Heteren (2019).
Referenties
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 den Berg, M.W., Van Houten, C.J., Den Otter, C. 2000. Toelichting bij de Geologische Kaart van Nederland 1 : 50 000, 34W, 34O/35.
Cite as
TNO-GDN ([YEAR]). Aalten Member. In: Stratigraphic Nomenclature of the Netherlands, TNO – Geological Survey of the Netherlands. Accessed on [DATE] from https://www.dinoloket.nl/en/stratigraphic-nomenclature/aalten-member.