Table 1 Minerals in the volcanic ash of the 2014 eruption at Ontake volcano
Fraction | Qtz | Crt | Trd | Fsp | Smct | Opx | Mica | Pyl | Kao | Pyr | Alu | Anh | Gyp |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Bulk | *** | ** | f | ** | f | *** | f | f | * | * | *** | f | ** |
Coarse | *** | *** | * | ** | f | *** | f | f | * | *** | * | f | * |
Medium | *** | ** | f | *** | f | f | f | *** | ** | ** | *** | * | |
Fine | *** | f | ** | f | ** | f | *** | f | *** | *** |