Question

4. What must be true about an index fossil whose absolute age is used as a reference for other fossils?

Answer 1

The correct answer is option C

Index fossil can be defined as the as the reference for the determination of the absolute age of the other fossils.

The age of index fossil can be determined by the radioactive dating or another method by which the absolute age of the index fossil can be determined.

Its age was used as reference to find the age of other fossils.

Answer 2

If an index fossil whose absolute age is used as a reference for other fossils, it was determined only by radioactive dating or another absolute method.