…In 1841, R.I. Murchison named the group of strata consisting of limestone, sandstone, marl, and gravel, which are well developed in the Perm region in the western Ural Mountains of Russia, as the Permian system. The strata of the same period are divided into two layers in Germany, the Redbottom and the Zechstein series, and have been called Dyas since J. Markow (1859), and this is the translation of the Permian system. In Japan, the Permian period has been used as a term to indicate the period since ancient times. … *Some of the terminology that mentions "Dyas" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…1841年R.I.マーチソンは,ロシアのウラル山脈西部のペルム地方によく発達する石灰岩,砂岩,泥灰岩,レキ岩などよりなる地層群をペルム系と名付けた。同時代の地層はドイツでは赤底統と苦灰統の2層になっていて,J.マルコウ(1859)以来ダイアスDyasと呼ばれ,二畳系はこの訳語である。時代を示す術語としては,日本では二畳紀の方がペルム紀より古くから用いられている。… ※「Dyas」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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