Final answer:
The principle of biostratigraphic correlation states that rocks with the same types of fossils are the same age.
Step-by-step explanation:
The principle of biostratigraphic correlation states that rocks with the same types of fossils are the same age. Biostratigraphic correlation is a method used in geology to determine the relative age of rocks by comparing the fossils found within them. If two rock layers contain the same fossils, it indicates that they were deposited at the same time.