…For example, in the area of the famous Simplon Tunnel, four nappes can be seen (Figure 1). The central part of each nappe is made of granite, migmatite or gneiss and is called the core rock. In contrast, the core rock is surrounded by crystalline schist and weakly to non-metamorphosed sedimentary rocks and is called the crust rocks (Figure 2). … *Some of the terminology that refers to "nuclear rock" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…例えば,有名なシンプロン・トンネルのある地域では,4枚のナップが認められる(図1)。個々のナップの中心部は,花コウ岩,ミグマタイトあるいは片麻岩からなり,核岩とよばれる。これに対し,結晶片岩や弱~非変成の堆積岩が核岩をおおうように包んでおり,皮殻岩とよばれる(図2)。… ※「核岩」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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