Figure 7

Images of experimental microwear traces of other mineral materials at high-magnification. See Supplementary Table S3 for more detailed descriptions of the experimental tools pictured here. (a) Flint, Exp 3473-Zone A (Supplementary Fig. S41), (b) Flint, Exp 3476-Zone F (Supplementary Fig. S48), (c) Quartz, Exp 3474-Zone B (Supplementary Fig. S43), (d) Quartz, Exp 3474-Zone B (Supplementary Fig. S43),(e) Sandstone, Exp 3474-ZoneA (Supplementary Fig. S43), (f) Sandstone, Exp 3474-Zone A (Supplementary Fig. S43), (g) Iron-cemented sandstone, Exp 3474-Zone C (Supplementary Fig. S44), (h) Iron-cemented sandstone, Exp 3474-Zone C (Supplementary Fig. S44), (i) Quartzite, Exp 3476-Zone C (Supplementary Fig. S47), (j) Quartzite, Exp 3476-Zone D (Supplementary Fig. S47), (k) Calcareous cortex of a flint nodule, Exp 3475-Zone D (Supplementary Fig. S46), (l) Calcareous cortex of a flint nodule, Exp 3475-Zone D (Supplementary Fig. S46), (m) Limestone, Exp 3475-Zone A (Supplementary Fig. S45), (n) Limestone, Exp 3475-Zone A (Supplementary Fig. S45), (o) Hematite, Exp 3478-Zone A (Supplementary Fig. S51), (p) Hematite, Exp 3478-Zone B (Supplementary Fig. S51), (q) Goethite, Exp 3479 (Supplementary Fig. S52), (r) Goethite, Exp 3479 (Supplementary Fig. S52), (s) Manganese dioxide, Exp 3480 (Supplementary Fig. S53), (t) Manganese dioxide, Exp 3481 (Supplementary Fig. S54).