Sentences with phrase «underlying ocean crust»

Not exact matches

More perplexing still, seismic studies have shown no evidence that ocean crust is being subducted — thrust down into the hot mantle underlying the trench — which is the process that results in quakes at other deep - sea trenches.

The oceanic crust moves away from the mid-ocean-ridges and ultimately gets transported back into the underlying mantle through «subduction» at ocean trenches.