Kenoran orogenic movement

Japanese: Kenoran orogenic movement（英語表記）Kenoranorogenicmovement

…The crustal movement that marks the end of the Archean Era in the Canadian Shield. It is also called the Kenoran orogenic movement. The intrusion of the Argoman Granite and the associated metamorphism occurred 2.2 to 2.6 billion years ago, with an average of 2.5 billion years ago. …

From the Canadian Shield

...orogens were formed around this area from the Paleozoic onwards. In the past, the orogeny accompanied by the intrusion of the Argoman granitic rocks (Argoman Orogeny) was considered to be the boundary between the Archean and Proterozoic eras, but in recent years this has come to be called the Kenoran orogenic movement (2.4 to 2.56 billion years ago). Based on its history of development, the Canadian Shield is divided into areas made up of rocks from the Archean era (2.5 to 3.7 billion years ago), areas made up of rocks from the Early Proterozoic era (1.6 to 2.5 billion years ago), and areas made up of rocks from the Middle Proterozoic era (800 to 1.6 billion years ago).

*Some of the terms that refer to "Kenoran orogenic movement" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…カナダ楯状地で始生代の末期を示す地殻変動。ケノーラン造山運動Kenoran orogenic movementともよんでいる。アルゴマン花コウ岩の貫入とそれに伴う変成作用の時期は22億～26億年前で，平均25億年前である。…

【カナダ楯状地】より

…これをとりまいて古生代以後の造山帯が形成された。古くはアルゴマン花コウ岩の貫入を伴う造山運動(アルゴマン変動)を始生代と原生代の境としたが，近年これはケノーラン造山運動Kenoran orogenic movement(24億～25.6億年前)とよばれている。カナダ楯状地内は発達の歴史によって始生代(25億～37億年前)の岩石よりなる地域，原生代前期(16億～25億年前)の岩石よりなる地域，原生代中期(8億～16億年前)の岩石よりなる地域などに分けられている。…

※「Kenoran orogenic movement」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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