how do index fossils help scientists?\nthey a...
how do index fossils help scientists?\nthey aid in the study of ranges of different organisms.\nthey advance understanding of the origin of life on earth.\nthey aid in comparison of rock layers at distant locations.\nthey advance understanding of rock type at the time the organism lived.
Answer
# Brief Explanations:
Index fossils are fossils that are used to date the rock layers in which they are found. They are widespread geographically but limited in time - range. By finding the same index fossil in different rock - layers at distant locations, scientists can correlate those rock - layers, meaning they can say those layers are of the same age.
# Answer:
They aid in comparison of rock layers at distant locations.