Eibergen Member

Formal (Van den Bosch et al. 1975).
Lithological description

Stiff dark brown clay, micaceous and moderately silty. Layers of very fine glauconitic sand. Basal conglomerate with reworked macrofossils, clay balls and phosphorite concretions. Low carbonate content related to post-depositional dissolution.

Depositional setting

Warm delta base, delta front (Van den Berg et al. 2000).

Definition of lower boundary

Gradual transition into shallow-marine clay (Aalten Member, Breda Formation).

Definition of upper boundary

Erosional contact with shallow-marine sand (Zenderen Member, Breda Formation).

Thickness indication
Up to about 10 m.
Geographical distribution
Restricted to the eastern Netherlands, close to the German border.
Regional correlation
North Sea: not present; UK: not present; GER: ?; BEL: not present.
middle - late Miocene.
Origin of name
Named after the village of Eibergen in the eastern Netherlands.
Previous name(s)
Reviewed by (date)
Dirk Munsterman (2018).
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]). Eibergen Member. In: Stratigraphic Nomenclature of the Netherlands, TNO – Geological Survey of the Netherlands. Accessed on [DATE] from https://www.dinoloket.nl/en/stratigraphic-nomenclature/eibergen-member.