Asked by fernanda

What are strata?


Sections of geologic time


Layers of rock

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Answered by GPT-5 mini AI
Layers of rock.

Strata (singular: stratum) are the physical layers of sedimentary rock or soil laid down over time. They record depositional events (thickness, composition, fossils) — geologists read them to infer Earth history. (“Sections of geologic time” refers to time units, not the rock layers themselves.)