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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-4a | 1.3 | – | 0.79 | 85 | 10 |
| IV-1 | 1.3 | R | 0.78 | 80 | 5 |
| V-1 | 1.7 | R | 0.71 | 30 | 80 |
