| Tertiary sediments (Oligocene - Pliocene) in the Gelderse Achterhoek and Twente (Winterswijk - Almelo region, eastern part of the Netherlands, provinces of Gelderland and Overijssel) are lithologically subdivided in a number of members. In this paper the Ratum Member, the Brinkheurne Member, the Winterswijk Member, the Aalten Member, the Eibergen Member, the Zenderen Member and the Lievelde Member are introduced. The Delden Member, already introduced in 1860, is redefined; this member occurs between the Zenderen Member and the Lievelde Member. The Aalten Member is subdivided in two new beds, the Miste Bed and the Stemerdink Bed respectively. For each of the lithological units a stratotype and some reference sections are designated. In the palaeontological... |
