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

Responses

Ammonites existed long before the dinosaurs.
Ammonites existed long before the dinosaurs.

Ammonites existed in a small geographic area.
Ammonites existed in a small geographic area.

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

Ammonites existed only in the oceans.

1 answer

Ammonites are a good example of an index fossil because ammonites existed for a relatively limited period of time. This characteristic allows geologists to use them to date the rock layers in which they are found, as they can identify specific time frames in the geological record.