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What are volcanic rocks? - VolcanoDiscovery: volcanoes worldwide - news, info, photos, an
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日期:2024-09-30
What are volcanic rocks?/ VolcanoDiscovery ... Volcanic rock is an igneous rock of volcanic origin. Volcanic rocks are usually fine-grained or aphanitic to glassy in texture. They often contain clasts of other rocks and phenocrysts....看更多