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出典:Wiktionary
From dia- + -treme.
出典:Wikipedia
出典:『Wikipedia』 (2011/07/22 23:19 UTC 版)
A diatreme is a breccia-filled volcanic pipe that was formed by a gaseous explosion. Diatremes often breach the surface and produce a tuff cone, a filled relatively shallow crater known as a maar, or other volcanic pipes.
diatreme