The following are the two movies generated from the Mantle data using Maya. To play the movies you need to install Divx. Its worth it. Its great. You can download and install from http://download.divx.com/divx/DivX511.exe. Do it, its quick, its painless and its fun!
The following are images generated from the Scripps Earth model availabe at http://mahi.ucsd.edu/Gabi/rem2.dir/shear-models.html These images are colored by Shear Velocity using standard VIBGYOR color scheme. Depths are center of the layer depths.
The following is a simple diagram of the different layers of the earth. The prior images above sample across the entire mantle starting at the Moho discontinuity to the Gutenburg discontinuity.