Which field of geology studies layered sedimentary rocks and their relative ages?

• A. Absorption
• B. Adhesion
• C. Stratigraphy
• D. Aphotic Zone

Answer: (C)

Stratigraphy studies layered sedimentary rocks and their relative ages. It uses principles such as the law of superposition, original horizontality, cross-cutting relationships, and fossil succession to determine which layers are older or younger without exact dates. Sedimentary rocks form in layered sequences, so their order records the passage of time. The other terms aren’t geology fields about rock layers—absorption and adhesion describe physical processes, and the aphotic zone is a marine zone lacking light. So stratigraphy is the field that fits.