Red-brown, sandy clay and siltstone interval with some intercalated sand/siltstone stringers. Anhydritic nodules are less common in this member (see Mijnlieff et al. 2011, Appendix B).
Not yet determined.
Conformably on the sandy succession of the Slochteren Formation or the Upper Slochteren Member. The boundary is placed at the top of the uppermost thick sandstone bed (see Mijnlieff et al. 2011, Appendix B).
Paraconformably overlain by the thin, black, bituminous claystones of the Coppershale Member of the Zechstein 1 (Werra) Formation of the Zechstein Group (see Mijnlieff et al. 2011, Appendix B1). Locally in the northeastern Netherlands, a thin, grey sandstone is intercalated between the Ten Boer Member and the base of the Zechstein Group, i.e. the informal Akkrum Sandstone member of the Slochteren Formation (RGD 1993).
