Byrd Wrote:
-------------------------------------------------------
> It appears to be a leftover granite stone. I've
> seen several reports that the top layer was a mix
> of Tura limestone and granite stones.
>
> Note that this is NOT a pristine site. There's
> holes drilled there in modern times, and people
> have been all over the thing for many thousands of
> years. I can't be certain, but it's not
> impossible that some of those stones were
> "adjusted" when they put up the lightning rod on
> top of the structure.
>
>
> You can see some historic pictures here:
> [curiosmos.com]

Thanks Byrd