FIGURE 2. Stratigraphic units and age ranges of sites.

The three stratigraphic columns on the left represent the measured and dated sequences. Optical ages are shown in thousands of years (kyr). Data from the Mungo I Residual and Mungo B trench are superimposed vertically for clarity of presentation. Three gravel units (G1, G2, G3) overlie barrier sands, with a band of dark humic, weak soil above the lowest recorded artefacts. The Mungo I and III transects are presented in vertical orientation to illustrate the relative unit thicknesses and to facilitate correlations between surveyed sections. The metric scale shows the actual distances from zero datum (see Fig. 1). The Mungo I and III burials (MI and MIII) have bracketing optical ages that are concordant and also consistent with stratigraphic correlations between the two transects. In the erosional cut-and-fill segment on the Mungo III transect, a unit of disconformable silty sands at 21.0 m (dated to 51.8 2.4 kyr) is stratigraphically equivalent to steeply dipping dune sands near 48 m (49.3 3.1 kyr); see stratigraphic reconstruction in Fig. 1. The synthetic section on the right summarizes the major units and sub-units for all sequences on the left, plotted alongside a timescale determined from the optically stimulated luminescence (OSL) chronology.