nigelswift wrote:
But the question arises, why? The bluestones aren't all that big. Would they be worked in order to reduce their weight for easier transport?
Common practice. Axes were usually worked into rough blanks at the quarry site before being taken to the location where they were finished, so why not adopt a similar approach to slightly larger stones? The sacredness of the main Stonehenge zone could have been a factor.
nigelswift wrote:
How about the bluestones were all pre-existing outlying monuments brought together in the central one?
My first option was that they were from somewhere else, although I hadn't considered the many-sites 'sub-option', and it is a possibility. 