greywacke

Japanese: greywacke
greywacke

…arkose is a arenite containing a large amount of feldspar and quartz, and is a sandstone formed from granite or gneiss areas. Greywacke is a hard, gray sandstone containing a large amount of mudstone. While arkose is formed during mountain building, graywacke has been thought to have formed as a turbidite during the geosynclinal period. …

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

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…アルコースarkoseとは長石,石英を多量に含むアレナイトで,花コウ岩や片麻岩地帯から運ばれてできた砂岩をいう。グレーワッケgreywackeは泥質基質を多く含み,灰色で堅硬な砂岩をいう。アルコースが造山時に形成されるのに対して,グレーワッケは地向斜期にタービダイトとして形成されると考えられてきた。…

※「greywacke」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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