Table 2 Interface types results from a point counting of 100 grains from very coarse (1–2 mm), coarse (1–0.5 mm) and medium (0.5–0.25 mm) grain size fractions from Alicudi and Filicudi sand samples (AL = Alicudi Island; Fi = Filicudi Island; Vc = very coarse, C = coarse, m = medium)
From: The use of mineral interfaces in sand-sized volcanic rock fragments to infer mechanical durability
Interface type | AL-3-Vc | AL-3-C | AL-3-m | Fi-3-Vc | Fi-3-C | Fi-3-m | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
N. | % | N. | % | N. | % | N. | % | N. | % | N. | % | |
Op/Glgr | 63 | 2.31 | 49 | 2.11 | 101 | 6.08 | 155 | 4.97 | 90 | 3.98 | 63 | 7.22 |
Pl/Glgr | 1127 | 41.36 | 888 | 38.29 | 604 | 36.34 | 911 | 29.22 | 764 | 33.78 | 249 | 28.56 |
Px/Glgr | 451 | 16.55 | 327 | 14.10 | 236 | 14.20 | 373 | 11.96 | 265 | 11.72 | 95 | 10.89 |
Ol/Glgr | 304 | 11.16 | 253 | 10.91 | 141 | 8.48 | 96 | 3.08 | 88 | 3.89 | 63 | 7.22 |
Hbl/Glgr | 40 | 1.47 | 63 | 2.72 | 83 | 4.99 | 63 | 2.02 | 106 | 4.69 | 26 | 2.98 |
Idd/Glgr | 5 | 0.18 | 13 | 0.56 | 0 | 0.00 | 6 | 0.19 | 0 | 0.00 | 0 | 0.00 |
Bt/Glgr | 5 | 0.18 | 0 | 0.00 | 0 | 0.00 | 57 | 1.83 | 30 | 1.33 | 0 | 0.00 |
Rt/Glgr | 0 | 0.00 | 0 | 0.00 | 0 | 0.00 | 0 | 0.00 | 0 | 0.00 | 0 | 0.00 |
Pl/Migr | 95 | 3.49 | 86 | 3.71 | 28 | 1.68 | 148 | 4.75 | 78 | 3.45 | 11 | 1.26 |
Px/Migr | 28 | 1.03 | 24 | 1.03 | 5 | 0.30 | 73 | 2.34 | 41 | 1.81 | 0 | 0.00 |
Op/Migr | 28 | 1.03 | 50 | 2.16 | 21 | 1.26 | 114 | 3.66 | 95 | 4.20 | 0 | 0.00 |
Ol/Migr | 5 | 0.18 | 0 | 0.00 | 8 | 0.48 | 34 | 1.09 | 5 | 0.22 | 9 | 1.03 |
Hbl/Migr | 0 | 0.00 | 0 | 0.00 | 3 | 0.18 | 4 | 0.13 | 7.00 | 0.31 | 0 | 0.00 |
Rt/Migr | 0 | 0.00 | 0 | 0.00 | 0 | 0.00 | 0 | 0.00 | 0 | 0.00 | 0 | 0.00 |
Bt/Migr | 0 | 0.00 | 0 | 0.00 | 0 | 0.00 | 0 | 0.00 | 0 | 0.00 | 14 | 1.61 |
Op/Ol | 46 | 1.69 | 87 | 3.75 | 53 | 3.19 | 42 | 1.35 | 56 | 2.48 | 27 | 3.10 |
Px/Ol | 53 | 1.94 | 20 | 0.86 | 19 | 1.14 | 10 | 0.32 | 15 | 0.66 | 9 | 1.03 |
Pl/Ol | 40 | 1.47 | 37 | 1.60 | 31 | 1.87 | 53 | 1.70 | 34 | 1.50 | 11 | 1.26 |
Pl/Op | 56 | 2.06 | 71 | 3.06 | 17 | 1.02 | 25 | 0.80 | 117 | 5.17 | 19 | 2.18 |
Px/Op | 65 | 2.39 | 64 | 2.76 | 50 | 3.01 | 308 | 9.88 | 129 | 5.70 | 39 | 4.47 |
Pl/Px | 66 | 2.42 | 51 | 2.20 | 31 | 1.87 | 167 | 5.36 | 75 | 3.32 | 31 | 3.56 |
Ol/Idd | 15 | 0.55 | 21 | 0.91 | 13 | 0.78 | 15 | 0.48 | 3 | 0.13 | 9 | 1.03 |
Hbl/Pl | 13 | 0.48 | 13 | 0.56 | 23 | 1.38 | 35 | 1.12 | 35 | 1.55 | 3 | 0.34 |
Hbl/Px | 10 | 0.37 | 1 | 0.04 | 4 | 0.24 | 8 | 0.26 | 8 | 0.35 | 3 | 0.34 |
Bt/Pl | 0 | 0.00 | 0 | 0.00 | 0 | 0.00 | 8 | 0.26 | 9 | 0.40 | 6 | 0.69 |
Bt/Px | 0 | 0.00 | 0 | 0.00 | 0 | 0.00 | 16 | 0.51 | 2 | 0.09 | 1 | 0.11 |
Bt/Op | 0 | 0.00 | 25 | 1.08 | 0 | 0.00 | 28 | 0.90 | 4 | 0.18 | 2 | 0.23 |
Hbl/Op | 16 | 0.59 | 25 | 1.08 | 48 | 2.89 | 90 | 2.89 | 72 | 3.18 | 48 | 5.50 |
Idd/Px | 5 | 0.18 | 3 | 0.13 | 0 | 0.00 | 6 | 0.19 | 0 | 0.00 | 0 | 0.00 |
Idd/Pl | 1 | 0.04 | 1 | 0.04 | 6 | 0.36 | 0 | 0.00 | 0 | 0.00 | 0 | 0.00 |
Ol/Bt | 0 | 0.00 | 0 | 0.00 | 0 | 0.00 | 7 | 0.22 | 0 | 0.00 | 0 | 0.00 |
Ol/Hbl | 0 | 0.00 | 5 | 0.00 | 5 | 0.30 | 0 | 0.00 | 3 | 0.13 | 0 | 0.00 |
Bt/Hbl | 0 | 0.00 | 0 | 0.22 | 0 | 0.00 | 0 | 0.00 | 0 | 0.00 | 0 | 0.00 |
Pl/Pl | 117 | 4.29 | 108 | 4.66 | 86 | 5.17 | 160 | 5.13 | 95 | 4.20 | 88 | 10.09 |
Px/Px | 25 | 0.92 | 14 | 0.60 | 13 | 0.78 | 52 | 1.67 | 18 | 0.80 | 26 | 2.98 |
Ol/Ol | 46 | 1.69 | 18 | 0.78 | 15 | 0.90 | 32 | 1.03 | 8 | 0.35 | 11 | 1.26 |
Op/Op | 0 | 0.00 | 1 | 0.04 | 8 | 0.48 | 12 | 0.38 | 4 | 0.18 | 6 | 0.69 |
Hbl/Hbl | 0 | 0.00 | 1 | 0.04 | 10 | 0.60 | 9 | 0.29 | 6 | 0.27 | 2 | 0.23 |
Bt/Bt | 0 | 0.00 | 0 | 0.00 | 0 | 0.00 | 1 | 0.03 | 0 | 0.00 | 1 | 0.11 |
TOT | 2725 | 100 | 2319 | 100 | 1662 | 100 | 3118 | 100 | 2262 | 100 | 872 | 100 |