火か砕さい物ぶつかさいぶつじ字FuriganaAudioMeanings1nounpyroclastic materialTechnical term in volcanology for fragmented material ejected during a volcanic eruption, including ash, lapilli, and volcanic bombs.火か砕さい物ぶつの堆たい積せき層そうから過か去この噴ふん火かの規き模ぼが推すい定ていできる。Break this sentence down in the analyzerThe scale of past eruptions can be estimated from deposits of pyroclastic material.
