Drillings, outcrops, and seismic data provide insights into a glacial basin and a former river channel in northern Switzerland. Both are infilled with diverse (glacial, lacustrine, fluvial, colluvial) sediments attributed to three separate glaciations. The depth of the glacial basin depends strongly on the underlying rock type, which together with (hydro)fractures provides evidence on the conditions and erosion processes at the ice–rock interface.