Volcanic rocks can be basic.Logical formLearned from10 sentences. A volcanic activity may increase.Logical formLearned from10 sentences. A volcanic activity can be continued.Logical formLearned from10 sentences. A volcanic rock can be fresh.Logical formLearned from10 sentences. A quake may be caused by a volcanic activity.Logical formLearned from10 sentences. A flow may come from a volcanic crater.Logical formLearned from10 sentences. A volcanic ash can be gritty.Logical formLearned from10 sentences. Waves may be set_offed by volcanic activity.Logical formLearned from10 sentences. (Undersea waves) may be triggered by volcanic activity.Logical formLearned from10 sentences. Some scientists may photograph volcanic activity.Logical formLearned from10 sentences. (Aircraft behavior) can be in volcanic ash.Logical formLearned from10 sentences. Deposits can be constituted-of-or-filled-with volcanic ash.Logical formLearned from10 sentences. A volcanic activity can be extreme.Logical formLearned from9 sentences. A plume can be volcanic.Logical formLearned from9 sentences. A series can be constituted-of-or-filled-with volcanic plugs.Logical formLearned from9 sentences.