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 Name of the Band Is Cowboy Mouth The Name of the Band Is Cowboy Mouth The Name of the Band Is Cowboy Mouth is a live concert by the band Cowboy Mouth released on DVD on November 20, 2007. It is the first DVD, and second video of the band, the first being 1996's 'Alive' on VHS. In addition, they appear in a scene in the 1995 movie "The Underneath". The DVD was recorded in front of a packed house at the Roxy On Sunset in Hollywood, California, during the summer of 2007. The title is a pun on a live concert by Talking Heads. According to