化か学がく化か石せき

noun

chemical fossil

Technical term in geology and paleontology for organic compounds preserved in rocks that indicate past life.

• 化か学がく化か石せきは、太たい古この生せい物ぶつの痕こん跡せきを示しめす有ゆう機き化か合ごう物ぶつだ。

  Chemical fossils are organic compounds that show traces of ancient organisms.