Extended Data Fig. 1: PYS MSA lithics.
Top, the relative sizes of flakes through layers 18–17 (MSA) and layer 16 (early LSA) visualized with a violin plot, illustrating the density of values by layer as a continuous distribution. Note the decrease across layers 17–16. The flakes recovered from the burial (n = 14), shown here with a box plot, fall within the variation in product weight for the MSA. The box plot shows the median value for burial lithics at the centre, with two neighbouring hinges marking the 25th and 75th percentiles. The whiskers plot the distance from the hinge values to the largest and smallest values in the burial dataset, to a maximum distance of 1.5 times the interquartile range (data beyond this range, if present, would have been plotted as individual outlier points). Below, facetted limestone flakes from MSA layers of PYS. A, limestone flake from burial context (809) with facetted dihedral platform; B, retouched limestone flake with large facetted platform from layer 17.
