At last, there is a chance that the origins of the Stonehenge sarsens might be sorted out. The researchers are due to finish this project in about one year's time. But it appears that they have already decided -- in line with what David Field has been saying -- that the sarsens have NOT all come from the Marlborough Downs.......
The sources of the stone used to construct Stonehenge have been debated by archaeologists and geologists for over a century. The smaller Bluestones, derived from west Wales, have attracted most attention. In comparison, virtually no work has been done on the sources of the larger sarsen stones (silcretes) used to construct the central Trilithon Horseshoe, outer Circle and peripheral settings. Conventional wisdom suggests that, given their size, the sarsens were all sourced from the Marlborough Downs. However, petrological, mineralogical and laser-scanning analyses indicate considerable variability among the Stonehenge sarsens, making this assumption questionable.