Depositional single-grain feldspar luminescence ages reveal the filling of a glacially overdeepened basin during Marine Isotope Stage 8, representing rare evidence of this time frame in the northern Alpine foreland. Reflection seismic surveys revealed two cross-cutting glacial basins. The dated sediments reveal significantly younger ages than previously assumed. This represents a first step in a re-evaluation of the established Quaternary depositional chronology of the Bavarian Alpine foreland.