A release can be volcanic.Logical formLearned from26 sentences. A layer can be constituted-of-or-filled-with volcanic ash.Logical formLearned from26 sentences. Sands can be volcanic.Logical formLearned from25 sentences. A volcanic eruption can be catastrophic.Logical formLearned from25 sentences. Periods can be constituted-of-or-filled-with volcanic activity.Logical formLearned from25 sentences. Fires can be volcanic.Logical formLearned from25 sentences. A volcanic rock can be dark.Logical formLearned from25 sentences. A volcanic soil can be red.Logical formLearned from25 sentences. A fire can be volcanic.Logical formLearned from25 sentences. A country can be volcanic.Logical formLearned from25 sentences. Islands can be volcanic.Logical formLearned from25 sentences. (Mud flows) can be volcanic.Logical formLearned from25 sentences. Volcanic activity may increase.Logical formLearned from25 sentences. A volcanic eruption can be imminent.Logical formLearned from25 sentences. A bedrock can be volcanic.Logical formLearned from24 sentences.