1. the divergence at mid-ocean ridges of the tectonic plates underlying the oceans that is due to upwelling from the earth's interior of magma which solidifies and adds to the spreading plates
sea-floor spreading 例句
英汉例句
The easy way to explain it is the sea-floor spreading and the plate tectonics movement.
容易的方法解释它是海洋-地板传布和碟子筑造学运动。
Both sea-floor spreading and oceanization may lead to the formation of oceanic crust.