4 what makes a good index fossil? a big and easy to see in the field b with a hard shell that can be easily…

4 what makes a good index fossil? a big and easy to see in the field b with a hard shell that can be easily preserved c spans over a long geological time period d widespread geographically and limited to a short span of geological time.

4 what makes a good index fossil? a big and easy to see in the field b with a hard shell that can be easily preserved c spans over a long geological time period d widespread geographically and limited to a short span of geological time.

Answer

Answer:

D. widespread geographically and limited to a short span of geological time.

Brief Explanations:

Index fossils are used for dating rock layers. They need to be widespread to be useful across regions and have a short - lived existence in geological time to accurately date the strata they are found in.