Age-depth model in calibrated yr BP and lithology of the Autrecourt-et-Pourron, section 3–6 sequence. Radiocarbon dates (Tab. 1) were calibrated using Oxcal 4.3 (©Christopher Bronk Ramsey 2018) based on the Northern Hemisphere terrestrial IntCal13 calibration curve (Reimer et al., 2013). The absolute chronology based on an age-depth model was produced with a 2σ confidence envelope using the CLAM package (Blaauw, 2010). The age-depth model is presented with its median (middle grey line) and its associated 95% confidence interval (grey area). The calibrated age range of dated samples is indicated in blue and the dates excluded from model in red (outlying). Two dates were rejected after age-depth modelling and outlier analysis, primarily because of age reversals.