Based on the age determined, do you think that this group of fossils could be considered index fossils? Why?

Question

Fossils Occurence and the Age of Rocks
Geologic time scale
Fossils include Quaternary, Tertiary, Tertaceous, Jurassic, Triassic, Permian, Pennsylvanian, Mississippian, Devonian, Silurian, Ordovirian, and Cambrain.

Answer 1

Index fossils should occur over a broad geographic range and a very limited time span. If a group of fossils occurred over the broad range you mention above...they would be lousy index fossils..

The whole idea of an index fossil is that if you were to find one in the rock record that you would know it occurred at a very restricted time..this identifying that layer of rock as that particular time. the time range you have listed above covers the entire geologic history of the world except the pre-cambrian.
the answer to your question is no.

Answer 2

An index fossil is a fossil that is a perfect indication of a specific time period... one that you can base other fossils off of to determine which period they came from, and one that comes from a very small or narrowed-down, specific time frame. You have listed almost every time period in geologic time. If a person listed each one of those periods as a time when this animal was living, it wouldn't be considered an index fossil