2017-11-15 / 最終更新日 : 2019-06-07 Aki@英語ニュース 歴史文化 「チバニアン」が地質年代を表す見通しに 【”Chibanian” likely to represent geological age】 A Japanese national research institute said on Monday that a geological period from 126,000 to 770,000 years ago will soon be called “Chibanian.” The name is based on a stratum discovered in Chiba Prefecture.