Pumice tuff
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A type of glassy tuff. Chemically, it is composed of whitish glass fragments derived from relatively silicic magma. Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information |
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ガラス質凝灰岩の一つ。化学成分上，比較的ケイ長質なマグマに由来する，色の白っぽいガラスの破片から成るもの。
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