Whoops!  The Piedmont of SC.  There are a lot of rock piles in the
area, most of which are probably the result of farmers removing rocks
from fields.  But all are made up mostly of quartz.  The rock pile by
the cemetery is not, so I'm working with the assumption they're
associated.  Incidentally, quartz also occurs only rarely in the many
chimney falls in the area, most of which are dominated by fieldstone
with a smattering of brick.  There's no other evidence of a structure
by the cemetery, so its pretty clearly not a chimney fall.  Nor does
it look like one.

The fieldstone naturally fractures along relatively flat planes,
making pretty good building material.  I suppose its that observation
as much as anything else that suggested the possibility of a cairn to
me.

Chris

>Where is the cemetery located?
>
>I have observed piles of fieldstones near the boundaries of cemeteries at
>various locations in the Middle Atlantic and Upper South.  When I
>have inquired
>of community members, I discovered that the stones were removed either to
>facilitate lawn mowing or because they were not recognized as gravemarkers by
>people thinking in terms of the formal carved gravestones.