Gunflint Formation

Japanese: ガンフリント層 - がんふりんとそう
Gunflint Formation


[Canadian Shield and Banded Iron Formations]
The Canadian Shield, which covers a vast area of ​​4.8 million km2, is made up of the Slave Province, Superior Province, which were affected by the Kenolan Orogeny, the Bear Province, Churchill Province, and Southern Province of the Hudson Orogeny, and the Grenville Province of the Grenville Orogeny. The Gunflint Formation (1.9 billion years ago), famous for the Gunflint Biota of the Early Proterozoic Era, is distributed on the north shore of Lake Superior. The Gunflint Formation, which is about 150 m thick, consists of a thick layer of iron ore sandwiched between a lower layer of pebble and an upper layer of limestone.

*Some of the terminology that refers to the "Gunflint Formation" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:


[カナダ楯状地と縞状鉄鉱層]
 480万km2という広大な面積を占めるカナダ楯状地ではケノーラン造山運動をうけたスレーブ区,スペリオル区,ハドソン造山のベアー区,チャーチル区,サウザン区,グレンビル造山のグレンビル区などからなっている。スペリオル湖の北岸には原生代前期のガンフリント生物群で有名なガンフリント層(19億年前)が分布する。約150mの厚さをもつガンフリント層は下部のレキ岩層と上部の石灰岩層とにはさまれた厚い鉄鉱層からなる。…

※「ガンフリント層」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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