An index fossil is a fossil of an organism from a species that did not live for very long. Index fossils are used by geologists and paleontologists to date and correlate the age of rock layers.
What is an index fossil?(1 point) Responses..
a fossil left during a mass extinction event
a fossil of a footprint or other trace made by an organism
a fossil of an organism from a species that did not live for very long
a fossil in igneous rock
1 answer