Table 2.

IR-RF ages returned from the 16 sediment samples collected in 2020. Three age clusters are present in the sediment, with the oldest aligning to MIS 14 and the youngest aligning with MIS 10 or 11 and probably reflecting reworking of the upper main gravel (note the impact of error ranges on these associations). Sample nine from the upper main gravel (UMG) appears as an outlier relative to the sand lenses in the intermediate coarse flint (ICF) layer. This possible overestimation may be due to an incompletely bleached IR-RF signal caused by rapid transportation and burial of sediment. Ages could not be returned for three samples due to a lack of appropriately sized feldspar grains.

^aNo sample was assigned to number 12.

^bApproximate mean age. The mean ages are based on the arithmetic mean of the ages belonging to one cluster. An age cluster was defined by a set of ages that are overlapping within the 1σ error range. The mean ages are presented with their standard error.