しじゅんかせき
示準化石
1. index fossil; zone fossil; guide fossil; indicator fossilGeology, Paleontology
2. Index fossilIndex fossils (also known as guide fossils, indicator fossils or zone fossils) are fossils used to define and identify geologic periods (or faunal stages). They work on the premise that, although different sediments may look different depending on the conditions under which they were laid down, they may include the remains of the same species of fossil.
Read “Index fossil” on English Wikipedia
Read “示準化石” on Japanese Wikipedia
Read “Index fossil” on DBpedia
Read “Index fossil” on English Wikipedia
Read “示準化石” on Japanese Wikipedia
Read “Index fossil” on DBpedia
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