High-level and/or long-lived radioactive waste is a major radiological hazard to man and environment. ONDRAF/NIRAS, the Belgian agency for radioactive waste management entitled to manage these materials in the long-term, currently investigates the safety and feasibility of geological disposal in poorly indurated plastic clays such as the Boom Clay and Ypresian clays. An important requirement for geological formations hosting a repository for radioactive waste is sufficient depth to ensure isolation of the waste from potential receptors (humans, animals, plants) and to protect it from potential detrimental processes occurring at the surface, for a very long time period, up to 1 Ma. Over such long timescales, the repository depth and the thickness of the overburden may vary significantly due to various geodynamic processes. The past evolution of the overburden and depth of a potential host formation is usually analysed using burial graphs, where the evolution of depth is depicted against time. These inaccurate graphs give insight in the past geological and geomorphological stability of a specific area when integrated alltogether. The Boom Clay burial graph in Mol has proven to be inaccurate for the last 1 Ma given the fact that a considerably amount of erosion, ca. 25 m, must have occurred since (Beerten et al., 2013). This implies that at present Boom Clay is not at its deepest burial depth at the Mol site, as has been suggested by previously compiled burial graphs (Mertens, 2005). In general, age control on burial and erosion events is poor, given the lack of datable material and/or the difficulty to quantify amounts and rates of erosion. The question arose whether the Pleistocene erosion event documented in the Mol area could be more accurately constrained in time. East of the Mol site, the aforementioned erosion event is thought to be inhibited by an erosionresistant landform, i.e., the Campine Plateau. It originally represented a river valley in which sediments from the river Rhine, and further to the south ...