English Dictionary

Cambrian explosion

IPA（発音記号）

/ˈkam.bɹɪ.ən ɪkˈspləʊ.ʒən/

固有名詞

(evolutionary biology) The relatively rapid appearance, during the Cambrian Period around 541 million years ago, of most major animal phyla, as demonstrated in the fossil record.

日本語の意味

カンブリア紀大爆発 - 約5.41億年前のカンブリア紀に、化石記録に示されるように、主要な動物門のほとんどが比較的急速に出現した現象を指す進化生物学的概念。

The Cambrian explosion reshaped marine ecosystems, marking the relatively rapid appearance of most major animal phyla in the fossil record.

カンブリア爆発は海洋生態系を一変させ、化石記録に示されるようにほとんどの主要な動物門が比較的短期間に出現したことを示しました。

意味（1）

(evolutionary biology) The relatively rapid appearance, during the Cambrian Period around 541 million years ago, of most major animal phyla, as demonstrated in the fossil record.

Alternatively, if animals had a relatively long Precambrian history, why do so many kinds appear abruptly and more or less synchronously in the fossil record during Early Cambran time? Was there an external environmental factor that either prevented animals from becoming fossilizable (i.e., large muscular, and/or mineralized) prior to the beginning of the Cambrian, or did some biological or environmental event trigger the metazoan radiation? Hypotheses that have been advanced to explain these questions tend to focus on either an external environmental control on, or an internal property of, the organisms that participated in the Cambrian explosion.

Cambrian explosions （ plural ）