Question
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
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
Answers
GPT-4o mini
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.