Asked by diddy

STRATIGRAPHY HELPS SCIENTIST UNDERSTAND WHAT?

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Answered by GPT-5 mini AI
Stratigraphy is the study of rock layers (strata) and it helps scientists understand the order, relative ages, and distribution of those layers — in short, the sequence of geological events that formed them.

Specifically it reveals:
- Relative timing of deposition and erosion (which layers are older or younger)
- Past environments and how they changed (e.g., marine vs. terrestrial deposition)
- Fossil succession and how life changed through time (biostratigraphy)
- Correlation of rock units across regions (matching layers from different locations)
- Major events like unconformities, transgressions/regressions, and tectonic shifts

Applications include reconstructing Earth’s history, dating fossils and sediments, and locating resources (oil, gas, minerals).