Which outcome results when subduction of oceanic crust halts?

💡 Explanation

Subduction cessation reduces pathways for cold crust to fuel mantle plumes, hence decreasing mantle convection cell formation because subduction drives cold material down, therefore the whole system slows with fewer plumes, rather than increasing ocean ventilation which needs active downwelling.

• Which outcome occurs when irrigation in arid climates mobilizes soluble salts?
• Which outcome results when a mine's karst aquifer recharge exceeds natural drainage?
• Which mechanism limits sediment deposition rate within a fjord undergoing isostatic rebound post-glaciation?
• Which outcome occurs when rapid snowmelt increases river discharge past the original design height of levees?
• Which downslope movement results when permafrost thaws and the active layer loses shear strength?
• Which effect of the earth's rotation most directly influences global ocean current deflection around continents?