珪質 けいしつ砂岩 しゃがんではありませんでした
keishitsu shagandewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 珪質砂岩

1. Was not siliceous sandstone.; Was not a siliceous sandstone.

Past/Perfective
Negative
Polite
Formal Register