the diagram shows outcrops (a, b, and c) excavated from three different regions. the rock layers and the…

the diagram shows outcrops (a, b, and c) excavated from three different regions. the rock layers and the index fossils in each outcrop are labeled in the image. assuming the rock layers in the outcrops were not overturned, which layers in the outcrops are the same ages?\no layers 1, 6, and 11\no layers 1, 10, and 16\no layers 2, 7, and 12\no layers 5, 10, and 16
Answer
Brief Explanations:
Index fossils are used to date rock - layers. Layers with the same index fossils are of the same age. In the given outcrops, layers 5, 10, and 16 all contain the same index fossil (the one represented by the circle with a dot in the key), indicating they are of the same age.
Answer:
Layers 5, 10, and 16