“oceanic crust”簡單造句，oceanic crust造句子

The thickness of continental crust is not only thicker but also less dense than that of oceanic crust. The average thickness of the continental crust is thirty-five kilometers, though it may be considerably thicker or thinner in particular regions.

The marginal sea crust is another kind of oceanic crust, which was formed after the basalt magma engulfed and devoured the tattered continental margin crust.

By 2011 scientists aboard a Japanese deep-sea drilling ship called Chikyu hope to start drilling through a thin piece of oceanic crust to reach Earth's mantle.

But geophysicists had thought that great subduction-zone earthquakes happened only where younger oceanic crust scrapes its way into the mantle.

Some Archean greenstone belts represent collages of allochthonous fragments, among which oceanic crust slices are identified with characteristics distinct from the Phanerozoic ophiolites.