深層 しんそう崩壊 ほうかいではありませんでした
shinsōhōkaidewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 深層崩壊

1. Was not a deep collapse.; Was not a profound breakdown.

Past/Perfective
Negative
Polite
Formal Register
Geology