Question

Which statement explains why ammonites are a good example of an index fossil?(1 point)Ammonites existed only in the oceans.Ammonites existed long before the dinosaurs.Ammonites existed for a relatively limited period of time.Ammonites existed in a small geographic area.

Answer 1

The statement that explains why ammonites are a good example of index fossils is:

Ammonites existed for a relatively limited period of time.

Index fossils are used to determine and to identify geologic periods and therefore shoud have a wide geographic distribution and a fast evolution trend.

Ammonites are a group of extinct cephalopods that can be found in a wide geographic distribution and also they became extinct rapidly