発散 はっさん がた境界 きょうかいじゃなかったです
hassangata kyōkaijanakattadesu

Noun
Desu Copula

The polite, past negative form of 発散型境界

1. Wasn't a diverging boundary.; Wasn't radiating outwards.

Past/Perfective
Negative
Polite
Casual Register
Geology