Light grey to light yellow fine to very coarse sand, non-calcareous, gravelly. Subordinate fine to very coarse gravel characterized by porphyry, lydite, radiolarite and transparent quartz. Locally, clay layers top fining-upward sequences marked by large-scale cross-bedded sets. Small percentages of tourmaline and other metamorphic minerals, as well as topaz, are characteristic (Rees Vellinga & De Ridder 1975; Zandstra 1971).
Braidplain of easterly rivers supplying sediment sourced partly in central and eastern Germany.
Gradual transition into older fluvial sand (Peize Formation). Locally sharp contact, where the top of the Peize Formation consists of pebbles and cobbles (Hattem Beds; Zandstra 1971).
Generally obscure contact with yellow, more calcareous fluvial sand and gravel (with more milky quartz; Sterksel and Urk Formations), which is partially reworked from the Appelscha Formation.