Why are the mid-ocean ridges higher in elevation than the surrounding ocean floor?
A) The force of magma extruding from the fissure pushes the seafloor up.
B) Warmer material near the ridge is less dense, so it is more buoyant on the mantle.
C) The collision of the tectonic plates is forcing material higher.
D) Thermal springs developing in stress fractures are depositing large volumes of material, increasing the height.
Answer: B
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