I know it means little to just look at the pictures of rock piles. I wish I had something intelligent to say about them. The best I can offer is that this was a site where the underlying bedrock was exposed in multiple little ridges creating corridors between the ridges, set off here and there by rock piles with a strong sense of there being deliberate lines of site following the natural bedrock. Like the pig skull site (as I said) and like the site from Harvard where it seemed the outcrops blended in with artificial terracing. All similar ideas of incorporating the direction of the bedrock.
Anyway, here were some of the nicer piles: