Paper 2 · June 2015 · Plate tectonics and fold mountains
A line on a map crosses a plate boundary where two plates are moving apart, new basaltic rock is forming on the seabed along the boundary, and the boundary lies on a mid-ocean ridge. What type of plate boundary is this?
Model answer
constructive boundary
Also accepted: divergent boundary, constructive plate boundary
Explanation
Plates moving apart with new basaltic rock forming between them on a mid-ocean ridge are the classic signs of sea-floor spreading at a constructive (divergent) plate boundary.
Derived from ZIMSEC Geography 2248/2 Paper 2, June 2015, Q1