Author Question: Why are the mid-ocean ridges higher in elevation than the surrounding ocean floor? A) The force ... (Read 108 times)

Coya19@aol.com · **on:** Jul 16, 2018

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.

Question 2

Continental rifting is occurring today in ________.

A) western California (San Andreas Fault)
B) between Minnesota and Wisconsin (mid-continent rift)
C) the Pacific Northwest (Cascadia subduction zone)
D) Ethiopia and Kenya (East African Rift valley)