Laurentian shield
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This is what was once called the Canadian Shield. It is the core of the North American continent, located north of the St. Lawrence River and the Great Lakes, and is composed of Archean and Proterozoic rocks. Canadian Shield [Shinji Sato] Source: Heibonsha World Encyclopedia, 2nd Edition Information |
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現在カナダ楯状地とよばれる地域をかつてこうよんだ。セント･ローレンス川と五大湖の北にある北米大陸の核で，始生代，原生代の岩石から構成されている。カナダ楯状地【佐藤 信次】
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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