24 which of these is indicated when index fossils are present in rock layers in different areas of the…

24 which of these is indicated when index fossils are present in rock layers in different areas of the world? choose the correct answer. a the rock layers formed during different periods of time. b the rock layers formed during the same period of time. c the rock layers are still forming. d the rock layers never fully formed.
Answer
Brief Explanations:
Index fossils are fossils used to define and identify geologic periods. If the same index fossils are present in rock - layers in different areas of the world, it means the rock layers formed during the same period of time.
Answer:
B. The rock layers formed during the same period of time.