What's in this picture?

[mandarin.orange]

I am working on a project for a Remote Sensing class, and did the following B/W coloration on an image. (It's actually a way of doing vegetation index, but that info isn't terribly useful in this case.)

Look especially at the dots in the lower-middle. What do you think these are? The lines are dirt roads, for some idea of scale.

Very curious to know what people think...esp. those that, like me, may spend their free time browsing GoogleEarth.

[singlecell]

I'll guess some kind of mining feature, little quarries maybe, since they are spaced so regularly and if I look really close I can see what looks like roads between the dots........ ?