How long is it estimated to take the ocean's volume of water to circulate through the oceanic crust at spreading centers?
A) 1 million years
B) 10 million years
C) 100 million years
D) 1 billion years

Question

Quizplus · Accepted Answer

It is estimated that a volume of water equal to the volume of the world's ocean is thought to circulate through the hot oceanic crust at spreading centers about every 10 million years. The heat and chemicals released through this circulation process is thought to play an important role in the chemical composition of the seafloor and even the atmosphere. Information can be found in the section The Topography of Deep-Ocean Basins Differs from That of the Continental Margins.

How Long Is It Estimated to Take the Ocean's Volume