volatile combustiblevolatile fluxvolatile mattervolatiles or volatile or volatilevolatilizationvolborthitevolcanvolcanellovolcanic accidentvolcanic aerosolvolcanic arc or volcanic arcs or volcanic arcsvolcanic arenitevolcanic ashvolcanic ash fallvolcanic ash flowvolcanic blockvolcanic blowpipingvolcanic bombvolcanic breccia or breccia or brecciavolcanic centervolcanic chainvolcanic clayvolcanic cloudvolcanic conduitvolcanic conevolcanic conglomeratevolcanic domevolcanic dust or volcanic dusts or volcanic dustsvolcanic earthquakevolcanic ejecta blanketvolcanic emanationvolcanic flow drainvolcanic foam or pumice or pumicevolcanic focusvolcanic frontvolcanic gasesvolcanic glassvolcanic grabenvolcanic gravelvolcanic graywacke or greywacke or greywackevolcanic harborvolcanic islandvolcanic mudvolcanic neckvolcanic pipevolcanic rentvolcanic rift zone or rift zone or rift zonevolcanic rock or volcanic rocks or volcanic rocksvolcanic sandvolcanic sandstone
