Part chart, part photorealism, all illustration. This figure was created for Living with Earth: An Introduction to Environmental Geology by Travis Hudson and published by Prentice Hall. Several additional samples from the same book can be found in the 3D Photorealistic section portfolio.
This graphic combines the textures created for other figures in the Living with Earth book into a schematic representation of seismic waves traveling through the Earth. As the waves change speed a change in the physical subdivisions of the geosphere is indicated.