Question

How fossils of species that lived on Earth for short periods of time and were abundant and were widespread geographically ?

Answer 1

Answer:

Index fossils represents the fossils of the organisms that lived in a particular geological time zone. The index fossils defines a geological time of a dead  organisms. Index fossil ensures that a correct order of geological time appears in a fossil record. The index fossils of organisms that lived for a short period, were abundant and widespread geographically.

Answer 2

They are called index fossils, an aid to relative dating of rock.