…(3) Ring dike: A ring dike is a magma intrusion that occurs when pressure in a magma chamber is reduced, resulting in cylindrical cracks in the surrounding rocks that open downward. (4) Dike swarm: A group of many dikes arranged in roughly parallel rows. Many parallel dike swarms are found in the Tertiary volcanic areas of Scotland. … *Some of the terminology that mentions "dike swarm" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…(3)環状岩脈ring dike マグマだまりのなかの圧力が減少し,そのため周囲の岩石に下方に向かって開いた円筒形の割れ目群が生じ,そこにマグマが貫入したもの。(4)平行岩脈群dike swarm ほぼ平行に配列した多数の岩脈の群。スコットランドの第三紀火山地域には多くの平行岩脈群が発達している。… ※「dike swarm」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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