The stones look weathered, but do they look like they were ever actually squared up and finished?
Thanks! Nice photo.
Inigo Jones on Stonehenge
http://wwp.greenwichpast.com/vip/architects/jones.htm
The rustic quality of the 16th-century restoration, was transformed by the architect Inigo Jones in the 17th century into a model of order and precision. Incapable of thinking that Druids could have been responsible for such an imposing structure, Jones identified Stonehenge as a Roman Temple and 'restored' it accordingly.
Just wondering since some of the horizontal stones have edges and the uprights seem rounded. Weathering might explain it, especially if there were many years of freezing weather. But England hasn't been freezing for a long time, so perhaps the stones were left rough in the first place. There is less erosion on the Sphinx. The pyramids of Gaza were surfaced in granite and show relatively almost no weathering except the soft stone considering they are supposedly about as old.