天てん変ぺん地ち異い説せつ

noun

catastrophism

Geological theory that Earth's features were shaped by sudden, violent events rather than gradual processes. Contrasts with 斉一説 (uniformitarianism).

• 天てん変ぺん地ち異い説せつは、かつて地ち質しつ学がくで有ゆう力りょくだった考かんがえ方かただ。

  Catastrophism was once a dominant idea in geology.

• 天てん変ぺん地ち異い説せつと斉せい一いつ説せつは、地ち球きゅうの歴れき史しをどう見みるかで対たい立りつしている。

  Catastrophism and uniformitarianism conflict over how to view Earth's history.