Table 4. Values of the selected features for the surfaces shown in Fig 7 and S11 Fig.

Sample	Point	Area	Material	Mean depth of furrows (nm)	Vmc (μm3/μm2)	Mean density of furrows (cm/cm2)
VSH4-5	3	2	Bone	139.17	0.11	2350.70
VSH4-3	2b	1	Hide	365.22	0.26	2524.55
VSH4-4	1a	1	Wood	487.85	0.73	2033.89
VSH4-2	2b	2	Cane	61.19	0.12	2439.83
VSH4-1	1a	2	Antler	252,17	0,41	2149.65
A35-5	2	1	Unused	102,66	0,08	1611.55