Hilltop Sites

This is an abstract drawing of how the rock piles sites are located on a group of hills out west of here near Rt 117. The road is the straight black line, the hills are the ovals, and the sites are in gray. It is interesting that all the sites are more-or-less south facing. Exploring the southwest shoulder of the hills out here has become a standard strategy for finding sites. That helped find the Long Hill Rd site of earlier.

Doesn't it seem a reasonable hypothesis that when we find two sites using the same topographic strategy, that the sites might have a common function? More specifically isn't it reasonable to suppose these sites on these hills have a similar function? The rock piles there have a lot in common too.