ぎょうかいがん
凝灰岩
1. tuff
2. TuffTuff (from the Italian tufo) is a type of rock consisting of consolidated volcanic ash ejected from vents during a volcanic eruption. Tuff is sometimes called tufa, particularly when used as construction material, although tufa also refers to a quite different rock. Rock that contains greater than 50% tuff is considered tuffaceous.
Read “Tuff” on English Wikipedia
Read “凝灰岩” on Japanese Wikipedia
Read “Tuff” on DBpedia
Read “Tuff” on English Wikipedia
Read “凝灰岩” on Japanese Wikipedia
Read “Tuff” on DBpedia
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