[rogerallen]

Sure looks like Turing patterns that you get with Reaction-Diffusion simulations.

See http://pmneila.github.io/jsexp/grayscott/ and select "holes"

[WildUtah]

Little circles in an apparently random pattern? Obviously, it's an anti-counterfeiting measure.

http://en.wikipedia.org/wiki/EURion_constellation

[alceufc]

"However, yet another recent theory proposes that grasses competing for water and nutrients - limited resources in the Namib desert - create the circles, explaining why they never overlap."

Maybe this model could be used to analyze this hypothesis.