中央 ちゅうおう海嶺 かいれいじゃありませんでした
chūōkaireijārimasendeshita

Noun
Desu Copula
no-Adjective

The polite, past negative form of 中央海嶺

1. It was not a mid-ocean ridge.

Past/Perfective
Negative
Polite
Terminal Form