Gotlandian period

Japanese: Gotlandian period(英語表記)Gotlandianperiod
Gotlandian period

...The name Silurian is taken from the old British ethnonym Silures, but the original name was given to a long geological period that included a part of the later Cambrian strata and the Ordovician and Silurian strata. Later, the name Gotlandian period came to be used for the period represented by the upper half of the strata, and to avoid various confusions, an international agreement was reached to call the first half of the Old Silurian period the Ordovician period, and the second half, i.e. the Gotlandian period, the Silurian period (in the narrow sense). During this period, marine invertebrates such as tabular corals, which were reef-building, and non-reef-building plants and animals that lived around them flourished.

*Some of the terminology that refers to the "Gotlandian period" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…シルル紀の名はイギリスの古い民族名シルリアSiluresからとられたものだが,最初の命名はのちのカンブリア紀の地層の一部とオルドビス,シルル両紀のものを併せた長い地質累層の時間に対してなされたものであった。その後その上半部分相当の地層が表す時代に対してゴトランド紀Gotlandian periodという名称が通用するようになり,種々の混乱を避けるために,改めて旧シルル紀の前半をオルドビス紀,後半すなわちゴトランド紀をシルル紀(狭義)と呼ぶように国際的な合意が得られた。この時代には海生無脊椎動物のうち,床板サンゴ類をはじめとする造礁性動物ならびにその周辺に生活する非造礁性動植物が栄えた。…

※「Gotlandian period」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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