| Pyroclastic flows (n = 5) | ||||
| Physical parameter | Range of values | Average; Standard deviation | Statistical parameters (Folk, 1980) | Range of values |
| Bimodal Greatest wt. % wt. % gravel wt. % sand Est. density (bulk) Est. density (fine sand) Est. density (coarse sand) | 4 of 5 0.07 mm, 5 of 5 8.3 to 18.3 wt. % 64.8 to 84.9 wt. % 0.6 to 0.8 g/cm3 0.8 to 0.9 g/cm3 0.5 to 0.8 g/cm3 |
12.2; 3.8 75.6; 9.5 0.7; 0.1 0.8; 0.1 0.7; 0.1 | Mz Sorting (ϭI) Skewness: Coarse (SkI) St. Coarse Kurtosis (KG): Mesokurtic Leptokurtic | 1.43 - 2.11Φ 1.72 to 2.49Φ 2 of 5 3 of 5
4 of 5 1 of 5 |
| Fine-grained sand unit (n = 14) | ||||
| Bimodal | 7 of 14 |
| Mz | 0.84 to 2.10Φ |
| Greatest wt. % | 0.07 mm, 12 of 14 0.25 mm, 1 of 14 0.42 mm, 1 of 14 |
| Sorting (ϭI) Skewness: N. sym. (SkI) Coarse | 1.57 to 2.41Φ 4 of 14 9 of 14 |
| wt. % gravel wt. % sand Est. density (bulk) Est. density (fine sand) Est. density (coarse sand) | 5.4 to 20.9 wt. % 65.8 to 89.6 wt. % 0.6 to 0.7 g/cm3 0.9 to 1.2 g/cm3 0.4 to 0.7 g/cm3 | 12.1; 5.0 81.6; 7.1 0.6; 0.04 1.0; 0.1 0.5; 0.1 | St. coarse Kurtosis (KG): Platykurtic Mesokurtic Leptokurtic | 1 of 14
5 of 14 5 of 14 4 of 14 |
| Sandy pumice gravel (±basalt/hydrovolcanic tuff) unit < 2.0 km (n = 10) | ||||
| Bimodal | 4 of 10 |
| Mz | −0.31 to 1.55Φ |
| Greatest wt. % | 0.25 mm, 1 of 10 0.42 mm, 6 of 10 0.84 mm, 3 of 10 |
| Sorting (ϭI) Skewness: St. fine (SkI) Fine | 1.24 to 2.35Φ 1 of 10 2 of 10 |
| wt. % gravel wt. % sand* Est. density (bulk) Est. density (fine sand) | 3.5 to 35.9 wt. % 61.4 to 89.6 wt. % 1.1 to 1.4 g/cm3 1.1 to 1.4 g/cm3 | 18.5; 10.6 76.4; 9.0 1.2; 0.1 1.2; 0.1 | N. sym. Coarse St. Coarse Kurtosis (KG): | 3 of 10 3 of 10 1 of 10
|
| Est. density (coarse sand) | 1.2 to 1.9 g/cm3 | 1.3; 0.2 | Platykurtic Leptokurtic V. Leptokurtic | 1 of 10 6 of 10 2 of 10 |
| 2.0 to 3.6 km (n = 21) | ||||
| Bimodal | 16 of 21 |
| Mz | −1.48 to 0.45Φ |
| Greatest wt. % | 0.25 mm, 2 of 21 0.42 mm, 6 of 21 0.84 mm, 2 of 21 2.00 mm, 7 of 21 4.75 mm, 4 of 21 |
| Sorting (ϭI) Skewness: St. fine (SkI) Fine N. sym. Coarse | 1.52 to 2.64Φ 2 of 21 3 of 21 9 of 21 7 of 21 |
| wt. % gravel wt. % sand Est. density (bulk) Est. density (fine sand) Est. density (coarse sand) | 18.2 to 69.0 wt. % 29.6 to 80.3 wt. % 0.4 to 1.1 g/cm3 0.7 to 1.2 g/cm3 0.4 to 1.2 g/cm3 | 39.6; 14.0 57.7; 14.2 0.6; 0.2 1.0; 0.2 0.7; 0.2 | Kurtosis (KG): Platykurtic Mesokurtic Leptokurtic
|
9 of 21 10 of 21 2 of 21
|
| >3.7 km (n = 5) | ||||
| Bimodal | 4 of 5 |
| Mz | −0.33 to 0.47Φ |
| Greatest wt. % | 0.84 mm, 4 of 5 4.75 mm, 1 of 5 |
| Sorting (ϭI) Skewness: St. fine | 1.23 to 2.88Φ 1 of 5 |
| wt. % gravel wt. % sand Est. density (bulk) Est. density (fine sand) Est. density (coarse sand)
| 11.2 to 42.6 wt. % 45.2 to 86.5 wt. % 0.4 to 0.7 g/cm3 0.6 to 1.1 g/cm3 0.4 to 0.7 g/cm3
| 25.1; 13.2 68.4; 15.7 0.6; 0.1 0.8; 0.2 0.6; 0.1
| (SkI) Fine N. Sym. Kurtosis (KG): Platykurtic Mesokurtic Leptokurtic | 3 of 5 1 of 5
1 of 5 2 of 5 2 of 5 |
| Pumice pebble-bearing, crystal-rich sand unit 0.9 to 1.2 km (n = 4) | ||||
| Bimodal Greatest wt. % wt. % gravel wt. % sand Est. density (bulk) Est. density (fine sand) Est. density (coarse sand) | None 0.42 mm, 4 of 4 0.3 to 2.9 wt. % 95.9 to 99.6 wt. % 1.3 to 1.4 g/cm3 1.3 to 1.4 g/cm3 1.3 to 1.4 g/cm3 |
1.2; 1.2 97.5; 1.6 1.3; 0.03 1.3; 0.05 1.3; 0.07 | Mz Sorting (ϭI) Skewness: Fine (SkI) N. Sym Kurtosis (KG): Mesokurtic Leptokurtic | 0.90 to 1.21Φ 0.68 to 1.02Φ 3 of 4 1 of 4
2 of 4 2 or 4 |
| 1.5 to 3.5 km (n = 32) | ||||
| Bimodal | 7 of 32 |
| Mz | 0.12 to 1.45Φ |
| Greatest wt. % | 0.42 mm, 29 of 32 0.84 mm, 4 of 32* |
| Sorting (ϭI) Skewness: Fine | 1.01 to 2.09Φ 3 of 32 |
| wt. % gravel wt. % sand Est. density (bulk) Est. density (fine sand) Est. density (coarse sand)
| 1.0 to 26.8 wt. % 69.0 to 96.5 wt. % 0.6 to 1.3 g/cm3 0.8 to 1.4 g/cm3 0.8 to 1.3 g/cm3
| 13.4; 6.7 83.8; 7.1 1.0; 0.2 1.2; 0.1 1.1; 0.2
| (SkI) N. Sym. Coarse St. Coarse Kurtosis (KG): Mesokurtic Leptokurtic V. Leptokurtic | 15 of 32 13 of 32 1 of 32
3 of 32 25 of 32 4 of 32 |