Fossils which are employed to trace the relative age of rocks are called
Question and options
Fossils which are employed to trace the relative age of rocks are called
- Prehistoric fossils
- Index fossils
- Secondary fossils
- Primary fossils
Answer and explanation
Correct answer: B - Index fossils
Index fossils are short-lived, widespread species used to correlate and determine the relative age of rock strata. Because such a species existed only for a brief span but over a wide area, rocks holding it can be matched in age across regions. "Primary", "secondary" and "prehistoric" fossils are not the recognised term for this dating role.
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