🧬ap biology review

Stratigraphy

Written by the Fiveable Content Team • Last updated September 2025
Verified for the 2026 exam
Verified for the 2026 examWritten by the Fiveable Content Team • Last updated September 2025

Definition

Stratigraphy is the study of rock layers (strata) and layering (stratification). It is primarily used in geology for dating and understanding geological events.