List of the 185 attributes used in the sample of studies analysed, with an indication of the usefulness of these attributes for identifying techniques.

The correspondence with the simplified attributes used in Supplementary 3 is also indicated. The names of studies in black indicate studies on flint or chert; the names of studies in red indicate studies on obsidian or glass; the names of studies in purple indicate studies on flint or chert and obsidian or glass; the names of studies in green indicate studies on quartzite; the names of studies in blue indicate studies on all materials. (XLSX)