Question

If the same index fossils are found in two separate rock layers, the two rock layers most likely reveal a disconformity. reveal a nonconformity. were formed at the same time. were formed at different times.

Answer 1

C was formed at the same time

Step-by-step explanation:

Answer 2

If the same index fossils were found in two separate rock layers, it would indicate that the rock layers were formed at the same time so the rock layers can be directly correlated even if geographically distant from one another. This is the principle that the great geologist William 'Strate' Smith worked out in his surveying of canals in England in the late 18th and early 19th centuries.