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Index fossils means ______?

انڈیکس فوسلز کا مطلب کیا ہے؟

Fossils of amphibians
Fossils used as reference for time scaling
Fossil of marine organisms
None of these

Answer: Fossils used as reference for time scaling

Explanation

Index fossils are used to identify and correlate the age of rock layers.

They are species that existed for a short.

It specific time but were widespread geographically.

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