変へん成せい岩がん

へ

ん

せ

い

が

ん

Meanings

1

noun

metamorphic rock

Technical term in geology for rock that has been transformed by heat, pressure, or chemical processes.

成turn into, become, get

岩boulder, rock, cliff

火か成せい岩がん
Igneous rock, formed from cooled magma or lava, as opposed to metamorphic rock which is transformed from existing rock types.
堆たい積せき岩がん
Sedimentary rock, formed by accumulation of sediments, distinct from metamorphic rock which has undergone transformation.

Compound of 変成 (metamorphosis) + 岩 (rock). The term is a direct translation of the English 'metamorphic rock'.