At www.bbc.co.uk/news/uk-wales-25004282 … research published in the Journal of Archaeological Science say they have found the specific outcrop of spotted dolerite from where most of the bluestones came from has been identifed. It is at Carn Goedog in the Preseli mountains. The rhyolites (another one of the bluestones) was sourced some 31km aw2ay at Craig Rhos y Felin. However, whether they were carried by ice to Wiltshire, or transported by humans is another question.
The same story is at www.dailymail.co.uk/sciencetech/article-2510487/Origins-Stonehenge-blue-… … which has a series of view images including a nice picture of the source stones at Stonehenge – but you can't see any of the bluestones. Nevertheless the dolerite outcrop and views across the Preselis make a nice picture – without the usual rain and black clouds. There is also a useful map in order to show the distances involved with transportation – by ice or heaving. Predictably, it has the modern coastline – not the one 5000 years ago.
At www.livescience.com/41349-ley-lines.html … this refers to some of the more extreme views about ley lines, and so called grids of earth energies. Anyone that doesn't know about this subject – this is a fair overview. These grids are supposed to circle the globe by connecting ancient (and so called sacred) sites such as Stonehenge and the Pyramids, and so on. Curiously, it claims, many old sites can be connected via straight line alignments (the ley lines as they have evolved). They go back to Alfred Watkins, and the archive of the Old Straight Track Club is kept at Hereford library. He was the first person to recognise that ancient sites appeared to be aligned to others nearby. His theory was that our ancestors built and raised permanent features on the landscape solely for navigation purposes. They didn't have maps or roads or signposts and he theorised they required some kind of landscape feature they could use instead. It is a bit like drovers – we know that in the period from the 13th to the 19th centuries large numbers of animals were being moved around the country – but how did these people know where the routes were, without landscape markers. The two things may be the same – we don't know if there is a connection. Watkins coined the term ley lines in 1921 but he never attached any magical or mystical significance to them – that came later, in the 1960s, and the New Age movement. Read what happened next via the link. See also www.BenjaminRadford.com