Volcanic Ash Chronology - Volcanic Ash Chronology

Japanese: 火山灰編年 - かざんばいへんねん
Volcanic Ash Chronology - Volcanic Ash Chronology

…also known as tephra chronology. Large-scale volcanic eruptions are extremely rare, but when they do occur, large amounts of tephra (volcanic ash, pumice, etc.) are released into the atmosphere along with gases, and are deposited over a wide area. …

*Some of the terminology that refers to the "Volcanic Ash Chronology" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…火山灰編年学ともいう。火山の大規模な噴火はごくまれな現象であるが,いったん起こると多量のテフラtephra(火山灰や軽石など)がガスとともに大気中に放出され,広域に広がって堆積する。…

※「火山灰編年」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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