āĻ āĻ¨ā§āĻ¸āĻ¨ā§āĻ§āĻžāĻ¨ āĻāĻ°ā§āĻ¨
āĻ āĻāĻŋāĻ§āĻžāĻ¨ā§āĻ° āĻāĻžāĻˇāĻž āĻ¨āĻŋāĻ°ā§āĻŦāĻžāĻāĻ¨ āĻāĻ°ā§āĻ¨
āĻāĻĒāĻ¨āĻžāĻ° āĻāĻžāĻˇāĻž āĻ¨āĻŋāĻ°ā§āĻŦāĻžāĻāĻ¨ āĻāĻ°ā§āĻ¨
index fossil
/ËÉĒndÉks fËÉsÉl/
Index fossil
01
āĻ¸ā§āĻāĻ āĻā§āĻŦāĻžāĻļā§āĻŽ, āĻāĻžāĻāĻĄ āĻā§āĻŦāĻžāĻļā§āĻŽ
a fossilized organism that is useful for dating and correlating the strata in which it is found, typically indicative of a particular time period in Earth's geological history
āĻāĻĻāĻžāĻšāĻ°āĻŖ
Geologists rely on index fossils to determine the relative age of sedimentary rock formations.
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āĻ¨āĻŋāĻāĻāĻŦāĻ°ā§āĻ¤ā§ āĻļāĻŦā§āĻĻ
