Respuesta :

A fossil simply means the remains of a prehistoric plant or animal that has turned into a rock. This is typically used by geologists.

Your information isn't complete. Therefore, an overview of the index fossil will be given. An index fossil simply means an animal or plant that is preserved in the rock record of the Earth.

Index fossils are used in defining and identifying geologic periods. For example, in marine strata, the fossil that is used as an index fossil is the single-celled protista such as ammonoids.

Learn more about fossils on:

https://brainly.com/question/11829803