Roughly what volume of the ocean has been recycled through the world mid-ocean rift systems in the last 5 million years?

Name: Roughly what volume of the ocean has been recycled through the world mid-ocean rift systems in the last 5 million years?
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Question

Quizplus · Accepted Answer

Approximately 50 percent of the ocean's volume has been recycled through the mid-ocean rift systems over the last 5 million years due to the process of seafloor spreading and hydrothermal circulation.

Roughly What Volume of the Ocean Has Been Recycled Through