Table 13. Summary characteristics of complete chert, quartzite and silcrete flakes across Holocene units.

	Chert		Quartzite		Silcrete
AU	1	2	1	2	1	2
# of flakes	495	64	95	41	145	72
Mass (g)	0.4 ± 0.4	0.4 ± 0.6	0.7 ± 1.4	0.8 ± 1.9	0.6 ± 1.1	0.7 ± 1.2
Surface area estimate	130 ± 101	130 ± 121.5	192 ± 198	180 ± 327	165 ± 186	172 ± 169
Elongation index	1.1 ± 0.7	1 ± 0.7	1.1 ± 0.6	1.1 ± 0.7	1.1 ± 0.6	1.1 ± 0.5
Overhang removal (#, %)	270 (42.1%) n = 641	49 (62.8%) n = 78	50 (37.9%) n = 132	20 (37%) n = 54	66 (35.7%) n = 185	22 (26.2%) n = 84
Number of dorsal scars	3 ± 2	3 ± 2	2 ± 1	2 ± 1	3 ± 1	2 ± 1
Flakes with cortex (#, %)	57 (11.5%)	4 (6.3%)	9 (9.5%)	4 (9.8%)	14 (9.7%)	1 (1.4%)
Feather terminations (#, %)	552 (72.2%) n = 765	67 (78.8%) n = 85	104 (71.7%) n = 145	51 (81%) n = 63	150 (75%) n = 200	75 (72.8%) n = 103

Each cell contains median and interquartile range unless otherwise stated