a type of trilobite is used as an index fossil. these fossils were made about 540 million years ago. a…

a type of trilobite is used as an index fossil. these fossils were made about 540 million years ago. a scientist finds a trilobite fossil in layer 3 in the diagram below. what can the scientist conclude from this finding?

a type of trilobite is used as an index fossil. these fossils were made about 540 million years ago. a scientist finds a trilobite fossil in layer 3 in the diagram below. what can the scientist conclude from this finding?

Answer

Brief Explanations:

Index fossils are used to date rock layers. Since the trilobite fossil is an index fossil made about 540 million years ago and is found in layer 3, layer 3 is likely about 540 million years old.

Answer:

The rock layer 3 is likely about 540 million years old.