示し相そう化か石せき

noun

facies fossil

Technical term in geology and paleontology. A fossil that indicates the environment of deposition (facies) rather than being used for biostratigraphic correlation.

• 示し相そう化か石せきは、当とう時じの環かん境きょうを推すい定ていするのに役やく立だつ。

  Facies fossils are useful for inferring the environment of that time.