Analysis of the surface microtextures and morphologies of beach quartz grains in Japan and implications for provenance research

Progress in Earth and Planetary Science

Table 2 Results of grain size distribution, mineral composition (n > 500), roundness of quartz, and frequency of two characteristics microtextures. Italic characters show > 0.75 (roundness) and > 50% (frequency of v-shaped percussion cracks and small holes)

Sample	Median diameters (Φ)	Dominant mineral composition group	Roundness	V-shaped percussion cracks (%)	Small holes (%)
I-1	0.8	CL	0.79	100	5
I-2	2.0	C	0.80	90	5
I-3	1.0	C	0.80	80	10
I-4	1.3	C	0.79	85	20
I-5	2.1	M	0.77	65	5
I-6	2.4	M	0.77	85	0
I-7	1.2	R, CL	0.77	75	10
I-8	0.4	R, CL	0.79	90	5
I-9	2.0	M, C	0.79	90	10
II-1	1.7	R, CL	0.72	15	35
II-2	1.1	R, CL	0.74	30	70
II-3	−0.2	CL	0.75	25	95
II-4	1.3	CL	0.73	70	80
III-1	2.0	CL	0.76	95	25
III-2	2.3	CL	0.76	55	15
III-3	0.2	CL	0.80	95	0
III-4^a	1.3	–	0.79	85	10
IV-1	1.3	R	0.78	80	5
V-1	1.7	R	0.71	30	80