Answer:
True.
Step-by-step explanation:
Index Fossil can be defined as those fossils that existed on Earth for relatively short period of time. It is any fossil that have a large geological area but short span of time.
Index fossils is also known as guide fossils or indicator fossils.
Some examples of index fossils includes Calico scallop, Scaphites, Mucrospirifer, etc.
Thus the given statement is true.