Lithosphere for silicate rocks, and formula_4 is the age of the given part of the lithosphere. The age is often equal to L/V, where L is the distance from the spreading centre of mid-oceanic ridge, and V is velocity of the lithospheric plate. Oceanic lithosphere is less dense than asthenosphere for a few tens of millions of years but after this becomes increasingly denser than asthenosphere. This is because the chemically differentiated oceanic crust is lighter than asthenosphere, but thermal contraction of the mantle lithosphere makes it more dense than the asthenosphere. The gravitational instability of mature oceanic lithosphere has the
The Good Earth (film) the Best Actress award (Luise Rainer), the film won for Best Cinematography. The film is recognized by American Film Institute in these lists: The Good Earth (film) The Good Earth is a 1937 American drama film about Chinese farmers who struggle to survive. It was adapted by Talbot Jennings, Tess Slesinger, and Claudine West from the play by Owen Davis and Donald Davis, which was in itself based on the 1931 novel of the same name by Nobel Prize-winning author Pearl S. Buck. The film was directed by Sidney Franklin, with uncredited contributions by Victor Fleming and Gustav Machaty. The