volcaniclastic material
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…(2) Secondary fragmentation of existing volcanic rocks. The former are called pyroclastic material and the latter volcaniclastic material. Pyroclastic rocks are usually classified according to the diameter of the constituent particles, as shown in the figure. … *Some of the terminology that refers to "volcaniclastic material" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
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…(2)既存の火山岩が二次的に破砕されたもの。前者をpyroclastic material，後者をvolcaniclastic materialと呼んで区別する。火山砕屑岩はふつう構成粒子の直径によって図のように分けられる。… ※「volcaniclastic material」について言及している用語解説の一部を掲載しています。 出典｜株式会社平凡社世界大百科事典 第２版について | 情報 |
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