How do layers B and D compare in age? If rock layers between B and D have eroded away, what is the boundary between B and D called?

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Biology

Mara

24 August, 15:43

How do layers B and D compare in age? If rock layers between B and D have eroded away, what is the boundary between B and D called?

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Lea Woodard · Answer 1

Rock layer D is older than rock layer B. The boundary between B and D is called an unconformity also. The geologist could use radioactive dating to determine the absolute age of F; then by the law of superposition, A must be at least as old as F, which lies above A.