green-stone belt

…In this region, areas mainly composed of metamorphosed volcanic rocks and areas mainly composed of metamorphosed sedimentary rocks are distributed alternately. The former huge volcanic rock belt (mainly composed of basaltic volcanic rocks) is called the greenstone belt, and is considered to be a volcanic area that characterizes the Archean era. Incidentally, Algoma is named after the Algoma region of Ontario, Canada. …

*Some of the terminology that refers to "green-stone belt" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…この地域には，変成した火山岩層を主とする地帯と変成した堆積岩を主とする地帯が交互に分布する。前者の巨大な火山岩帯(主に玄武岩質火山岩より成る)はグリーンストン帯green‐stone beltとよばれ，始生代を特徴づける火山活動地帯とされる。なお，アルゴマンはカナダのオンタリオ州アルゴマAlgoma地方にちなむ。…

※「green-stone belt」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