Map Of Earth's Mantle Reveals That It's Churning 10 Times Faster Than We Thought
There is a lot that scientists do n’t knowabout the mantle , the partly molten , partly solid layer of Earth that makes up 84 per centum of the planet ’s volume . We bed that it ’s composed of huge cycling masses of material moving around in gigantic loops called “ convection currents , ” and in - between these loops , superheated plumesrise up through to the surface of Earth , creating near - eternal sources of volcanism ....