| The VolcanicAsh concept represents types of ObscurationPhenomena involving fine particles of rock powder that originate from a volcano and that may remain suspended in the atmosphere for long periods. |
| •owl:Thing |
| •SpatioTemporalThing |
| •Endurant |
| •PhysicalEndurant |
| •AmountOfMatter |
| •Substance |
| •MixedSubstance |
| •Contaminant |
| •Ash |
| •VolcanicAsh |
| •Perdurant |
| •Event |
| •Phenomenon |
| •ObscurationPhenomenon |
| •VolcanicAsh |