National News

Age of magnetic shift to be named after Chiba

音声ダウンロード

The name "Chibanian," based on a stratum discovered in Chiba Prefecture, is set to represent the geological age when the latest reversal of the Earth's magnetic fields is believed to have occurred, researchers said Nov. 13.

The National Institute of Polar Research said the term, meaning "Chiba age," will likely be formally adopted by an international society by the end of next year.

The Chibanian age will refer to a geologic time period from 770,000 to 126,000 years ago, when the north and south magnetic poles switched. (Kyodo)

地球史に「千葉時代」誕生へ

国立極地研究所は11月13日、地球の歴史のうち77万〜 12万6千年前を「チバニアン（千葉時代）」と名付けるための申請が、国際学会での１次審査を通過したと発表した。

The Japan Times ST: November 24, 2017