14. At mid-ocean ridges, molten material (magma) rises from the mantle and erupts as fissure volcanoes. The molten material then spreads out, pushing an older rock to both sides of the ridges. This process is called? *
The process is called sea-floor spreading. Ridges form along cracks (divergent boundaries) in the oceanic crust (Molten rock (magma) rises through these cracks and pushes to both sides.
