🔒 Pro members only
Fossils and rock layers
Explain how geologists use fossils and sedimentary rock layers to study Earth’s 4.6-billion-year history. Apply the Law of Superposition and the Law of Crosscutting Relationships to determine relative ages of rock layers and trace the evolution of life.
This lesson is part of the members-only content of Middle school Earth and space science. The first 3 lessons of every course are free — this one starts after the free preview.
- ✓ Unlimited access to every lesson, video and article
- ✓ All subjects and age groups in one membership
- ✓ Cancel anytime · Visa & MasterCard accepted