Which of the following is correct about the concept of the sea floor spreading?
Hess argued that constant eruptions at the crest of oceanic ridges causes the rupture of the oceanic crust and the new lava wedges into it, pushing the oceanic crust on either side.
The ocean floor that gets pushed due to volcanic eruptions at the crest, sinks down at the oceanic trenches and gets consumed.
The younger age of the oceanic crust and the spreading of one ocean causes the shrinking of the other.