Which mechanism initiates seafloor spreading at mid-ocean ridges?

💡 Explanation

Seafloor spreading starts with mantle convection divergence below the lithosphere because buoyant magma rises, causing plates to split; therefore, the ridge forms rather than by compression from tidal forces as plate divergence initiates the spreading.

• Which outcome occurs when increased glacial meltwater enters ocean currents?
• Which consequence results when rapid cooling arrests lava flowing uphill?
• Which outcome occurs when rainfall increases in subtropical regolith?
• Which long-term outcome results when sediment blocks tributary inflow to river-fed lakes?
• Which process rapidly alters river delta morphology when coarse alluvial sediment deposition reduces flow capacity?
• Which geomorphic feature accumulates landward due to drift?