Figure 1
Schematic illustration of idealized Châtelperronian (a) and Protoaurignacian (b) blade cores. Drawn after Bon 2002 (Figure 77, pg. 158); Roussel 2013 (Figure 2, pg. 240); Roussel et al. 2016 (Figure 5b, pg. 21).
Figure 2
Schematic illustration of the three core attributes being considered in this study. These attributes are described in detail in Section 4.
Figure 3
Location of study sites overlaid with the approximate known geographic range of the Châtelperronian (blue with dotted border) and the Protoaurignacian (green with solid border).
Figure 4
3D models of the cores included in this study. A list of the artifacts included in this figure can be found in supplemental file 8.
Figure 5
The angle between the platform and flaking surface as measured in Geomagic Design X. The dotted blue line represents the intersection between the platform plane and the core model. The artifact represented is from the Les Cottés Protoaurignacian (CTS_CP_S6-993).
Figure 6
Results of the analysis of the angle between core surfaces: (a) Distribution of raw data; (b) Box plot comparing data from the three different assemblages. The black circle represents the assemblage mean, the box represents the extent of the middle quartiles, and the whiskers represent the minimum and maximum observed values.
Figure 7
Core cross section images used for elliptical Fourier analysis.
Figure 8
Normalizing core cross section outline data in Chc2Nef: Left) orientation upon import; Right) after manual rotation.
Figure 9
Results of a principal components analysis of the elliptical Fourier core cross section data. Top: comparison of principal components 1 and 2. Bottom: comparison of principal components 2 and 3. The outlines represent extremes 2 standard deviations from the mean contour along each axis.
Figure 10
Results of a principal components analysis of the elliptical Fourier data with points colored by core volume by quartile. Quartiles were calculated separately for the combined Châtelperronian (CP) and Protoaurignacian samples (PA). Quartile 1 comprises the smallest 25% percent of the sample by volume. Quartile 2 comprises the 25th to 50th percentile of the sample by volume. Quartile 3 comprises the 50th to 75th percentile of the sample by volume. Quartile 4 comprises the largest 25% of the sample by volume.
Figure 11
Image exported from ImageJ using the workflow described in section 4.3.1. The measured angle between core axes is marked in yellow. Artifact pictured is CTS_CP_U6-467.
Figure 12
Results of the analysis of the angle between core axes: (a) Distribution of the raw data; (b) Box plot comparing data from the three different assemblages. The black circle represents the assemblage mean.