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示準化石 (shijunkaseki) Japanese meaning: index fossil | Kotomora

示し準じゅん化か石せき

し

じゅ

ん

か

せ

き

Meanings

1

index fossil; guide fossil

geology›paleontology›

Technical term in geology and paleontology for a fossil used to define and identify geological periods.

示し準じゅん化か石せきは地

ち

層そう

の

年ねん

代だい

を

決き

める

の

に

役やく

立だ

つ

。

Index fossils are useful for determining the age of strata.

Kanji

示show, indicate, point out
準semi-, correspond to, proportionate to
化change, take the form of, influence
石stone

Etymology

Compound of 示準 (shijun, 'indicating standard') and 化石 (kaseki, 'fossil'). The exact derivation is uncertain, but the term is a modern technical coinage.