神じん代だい杉すぎ

noun

lignitized Japanese cedar

Refers to ancient Japanese cedar wood that has undergone lignitization, a process of fossilization where the wood becomes lignite-like. This is a specialized geological or paleobotanical term.

• この地ち域いきでは神じん代だい杉すぎが発はっ掘くつされることがある。