stratigraphy
/strəˈtɪɡrəfi/
noun
- The branch of geology that studies rock layers (strata) and their sequence, composition, and history.
- She studied stratigraphy to learn how ancient environments changed over time.
- The textbook explained the basic principles of stratigraphy, including the law of superposition.
- Stratigraphy helps scientists understand the order of events in Earth's history.