Which statement explains why ammonites are a good example of an index fossil?(1 point)

Question

Responses

A. Ammonites existed for a relatively limited period of time.
B. Ammonites existed only in the oceans.
C. Ammonites existed in a small geographic area.
D. Ammonites existed long before the dinosaurs.

Answer 1

A. Ammonites existed for a relatively limited period of time.

Index fossils are organisms that were widespread but only existed for a short geological timeframe, making them useful for dating and correlating the age of rock layers. Ammonites fit this criterion well.