Yellowish grey to greyish brown medium to very coarse sand, moderately to very gravelly. Locally, fine to coarse gravel in lags. Subordinate silty clay beds and sporadic clayey peat layers.
Braided and meandering fluvioglacial (northerly crystalline material and flint) and fluvial (Rhine and its precursors), including braided and meandering stream, and braidplain and floodplain (Busschers 2008). Lacustrine.
Usually sharp contact, marked by a gravelly channel lag. Unconformable contact with finer fluvial sand and clay (Urk, Sterksel, Waalre, Stramproy and Kieseloolite Formations), till (Gieten Member, Drente Formation), or glaciolacustrine clay and fine sand (Uitdam Member, Drente Formation). Diffuse transition into coarse and gravelly Meuse sand (Beegden Formation), partially gradual transition into fluvioglacial sand (Schaarsbergen Member, Drente Formation). Stiff silty clay (Wijchen Bed) locally unconformably on top of periglacial sand (Boxtel Formation).
Top partly marked by stiff silty clay (Wijchen Bed) with a palaeosol. Unconformable, locally gradual transition into softer humic clay and finer, more micaceous and carbonate-rich sand (Echteld Formation), finer periglacial coversand (Boxtel Formation), or peat Basal Peat Bed, Nieuwkoop Formation). Generally sharp contact with shelly marine sand (Eem Formation) or finer, more clayey and calcareous tidal sand (Naaldwijk Formation).
