noun
fossil wood; petrified wood
Refers to wood that has been fossilized through permineralization or replacement by minerals. Used in geology and paleontology contexts.
この地域では木化石がよく見つかる。
Fossil wood is often found in this area.
博物館に大きな木化石が展示されている。
A large piece of petrified wood is on display at the museum.
珪化木 is a more technical term for silicified wood, a type of petrified wood where the original material is replaced by silica.
Compound of 木 (tree, wood) and 化石 (fossil). The reading もくかせき follows the on'yomi of the characters.