Breaking news from British Archaeology:

New Stonehenge Bluestone Mystery
The theory that almost all the Stonehenge bluestones came from the Preseli Hills in Pembrokeshire, accepted by most archaeologists since first proposed in 1920, is wrong, say two geologists. Rob Ixer and Richard Bevins have studied thousands of rock specimens from recent excavations at Stonehenge. They conclude that many bluestones came not from Pembrokeshire, but from a far wider area, perhaps north Wales (Snowdonia, the Llyn Peninsula and Anglesey), or even beyond. The well-known spotted dolerite is a Preseli rock, they say – but the likely source was not Carnmenyn (where archaeologists have recently claimed to have found quarries) but nearby Carngoedog.