Urkraton

Japanese: Urkraton
Urkraton

...The oldest part is called the continental core. In 1934, German geologist H. Stille defined five regions on Earth as the world's oldest continental masses, which he named the Urkraton protolith. These were called Rusia (most of Scandinavia and parts of Russia), Angaria (central Siberia), Laurentia (most of Canada and Greenland), Sinia (eastern China), and Gondwania (South America, Africa, India, etc.), but most of them are shield-like.

*Some of the terminology that mentions "Urkraton" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…この最も古い部分を大陸核と呼ぶ。ドイツの地質学者シュティレH.Stilleは1934年,世界最古の大陸塊として五つの地域を地球上に設定し,原剛塊Urkratonと名づけた。これらは,ルシア(スカンジナビアの大部分とロシアの一部),アンガリア(シベリア中部),ラウレンティア(カナダとグリーンランドの大半),シニア(中国東部),ゴンドワニア(南アメリカ,アフリカ,インドなど)と呼ばれたが,大部分が楯状地である。…

※「Urkraton」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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