Dr. Nomura is a geologist who studies rock formations from the Cretaceous period of Earth’s history. His most recent study compares rocks from rock formations in two different locations. The information from the study is as follows: • Rock A formed from small pieces of rock. • Rock B formed from liquid rock in a different place. • Rocks A and B formed at about the same time in the Cretaceous period. Dr. Nomura wants to write a report to other geologists. Are Rocks A and B the same or different types of rock?