Calabrian Formation - Calabrian Formation

Japanese: カラブリア層 - からぶりあそう
Calabrian Formation - Calabrian Formation

…In the past, the Quaternary Period was defined as the Great Ice Age or the time when humans first appeared, but it has become increasingly clear that large glaciers were formed in the latter half of the Quaternary Period, while humans had already appeared at the end of the Tertiary Period, and so it is no longer meaningful to divide the Tertiary and Quaternary Periods based on these characteristics. Currently, the boundary between the Tertiary and Quaternary Periods is generally determined by academic agreement to be the time when the deposition of the Calabrian Formation, which is distributed in northern Italy, began. However, it is known that there was no major change in the history of life or climate at this boundary. …

*Some of the terminology that refers to the "Calabrian Formation" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…古くは,第四紀を大氷河時代として,あるいは人類が出現した時代として定義してきたが,大規模な氷河が形成されたのは第四紀の後半であり,一方,人類は第三紀末にすでに出現していたことがしだいに明らかとなってきて,これらを特徴として第三紀と第四紀を区分することは意味がなくなった。現在では,第三紀と第四紀の境界は学界の約束によってイタリア北部に分布するカラブリア層の堆積が始まった時と定められている。しかし,この境界部で生物史あるいは気候史上の大きな変化があったわけではないことがわかっている。…

※「カラブリア層」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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