Hi, through www.PlanetaryGIS.org it is possible to visualize the SHARAD (Shallow Radar) subsurface images as vertical profiles within Google Earth. The SHARAD ‘radargrams’ provide an image of the subsurface of Mars. Especially the polar ice caps show nice layering.
Please go here to learn how to visualize SHARAD in Google Earth: http://www.planetarygis.org/news/2009/03/23/making-sharad-easy/
I’m still working on perfecting this tool, especially how to handle the thick accumulation of SHARAD footprint lines in the polar regions, but broadly speaking it is ready to use. Please provide feedback if you have any 😉