question 21 of 25 a type of trilobite is used as an index fossil. these fossils were made about 540 million…

question 21 of 25 a type of trilobite is used as an index fossil. these fossils were made about 540 million years ago. a scientist finds a trilobite fossil in layer 5 in the diagram below. what can the scientist conclude from this finding? a. fossils in layer 6 are less than 540 million years old. b. fossils in layer 2 are less than 540 million years old. c. all the fossils in this diagram are more than 540 million years old. d. fossils from layer 9 are the newest in the diagram.

question 21 of 25 a type of trilobite is used as an index fossil. these fossils were made about 540 million years ago. a scientist finds a trilobite fossil in layer 5 in the diagram below. what can the scientist conclude from this finding? a. fossils in layer 6 are less than 540 million years old. b. fossils in layer 2 are less than 540 million years old. c. all the fossils in this diagram are more than 540 million years old. d. fossils from layer 9 are the newest in the diagram.

Answer

Brief Explanation:

In geology, the principle of superposition states that in undisturbed sedimentary rock layers, the oldest layers are at the bottom and the youngest are at the top. Since the trilobite fossil (about 540 million years old) is in layer 5, layers above it are younger and layers below it are older. Layer 2 is below layer 5, so fossils in layer 2 are more than 540 million years old. Layer 6 is above layer 5, so fossils in layer 6 are less than 540 million years old.

Answer:

A. Fossils in layer 6 are less than 540 million years old.