放射 ほうしゃ年代 ねんだい測定 そくていじゃなかったです
hōshanendaisokuteijanakattadesu

Noun
Desu Copula

The polite, past negative form of 放射年代測定

1. Wasn't radiocarbon dating.; Wasn't dated radiometrically.

Past/Perfective
Negative
Polite
Casual Register