Magma is pushed up through the ridges in the seafloor to form new oceanic crust. The energy from earth’s interior is transferred as the magma rises to cause the materials to move.
As each new layer emerges, the prior layer is pushed away from the ridge. if the space between the crust is the ridge, and the black rectangles represent the magma,
then which black rectangles represent the oldest portion, and which black rectangles represent the youngest portion of oceanic crust ?