Geological Fault Cake

Here's a cool-looking, cheap, easy-to-make cake that provides a quick visual explanation of how earthquakes work...

http://blogs.scientificamerican.com/rosetta-stones/2013/07/11/baked-geology-shellis-rainbow-fault-cake/

Thanks to Elizabeth Barrette for this link.

Although Dana Hunter's recipe is wheat-based, it would also work with gluten-free white cake mix. Or sugar-free cake mix.