English Dictionary

mass extinction event

名詞

(evolutionary theory, geology) One of five historical events in which the Earth experienced a loss of ∼75% of all species over a geological interval of less than 3 million years, the most recent being the Cretaceous–Paleogene extinction event 66 million years ago.

日本語の意味

地質学や進化論において、地球上の生命の約75%が、300万年以内の地質学的期間にわたって急激に絶滅したとされる5つの大規模な絶滅事象の一つ。特に最後の事象は、約6600万年前の白亜紀‐古第三紀境界で起こったとされる。

Geologists debate whether the rapid disappearance of diverse marine fossils in the layer signals a mass extinction event comparable to the end-Cretaceous die-off.

地質学者たちは、その地層に見られる多様な海洋化石の急速な消失が、白亜紀末の大量絶滅事象に匹敵するものかどうかを議論している。

意味（1）

(evolutionary theory, geology) One of five historical events in which the Earth experienced a loss of ∼75% of all species over a geological interval of less than 3 million years, the most recent being the Cretaceous–Paleogene extinction event 66 million years ago.

Joab is a two-mooned habitable planet that is most well known for its mass extinction event. Thousands of years ago, Joab was home to a primate-like spacefaring civilization as well as abundant flora and fauna. However, this can only be deduced from time capsules put into the ground well outside habitation centers -- all cities and detectable dwellings were targeted in a massive orbital bombardment that turned them into vapor. The resulting dust shroud killed all photosynthetic life and all fauna dependent on it.

mass extinction events （ plural ）