Kemperkoul Member

Succession of light- to dark-grey mudstones with frequent intercalations of coal seams and intervals of grey and buff, (sub-)angular, fairly- to poorly-sorted, very fine- to coarse-grained channel and sheet sandstones of 5 to 15 m thick. Fining- as well as coarsening-upward trends are common. The dark mudstones can contain a fresh- or brackish-water fossil assemblage.

Alternation of lacustrine, swamp and flood-plain deposits. Sandstones deposited as low- and high-sinuosity fluvial channel fills, associated overbank deposits and lacustrine deltas.

Boundary with the Maurits Formation is situated at the base of the lowermost massive sandstone bed which has a thickness of several metres. The interval of the Maurits Formation underlying this member can be referred to informally as the main Maurits member (DCCUM).

Unconformably covered by the Chalk Group in the type well, but it can be succeeded conformably by the massive sandstones of the Neeroeteren Formation.