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 "Classic Drummer", the crowd at the concert included: Ellen DeGeneres (Vance's sister), Portia de Rossi, David Steinberg, Hanson, and music producer Matthew Wilder (No Doubt, Christina Aguilera, Kelly Clarkson). Mark Bryan, the guitarist for Hootie and The Blowfish, makes an on stage appearance, joining the band on the song "I Can Tell". 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'