pont season

The source of Stonehenge's bluestones – a distinctive set of stones that form the inner circle and inner horseshoe of Stonehenge – has long been a subject of fascination and considerable controversy.  

In the early 1920s, one type of bluestone, the so-called ‘spotted dolerite’, was convincingly traced to the Mynydd Preseli area, in north Pembrokeshire.  However, the sources of the other bluestones - chiefly rhyolites (a type of rock) and the rare sandstones remained, unknown. 

Now geologists at Amgueddfa Cymru, the National Museum Wales, have further identified the sources of one of the rhyolite types.

The find also provides the opportunity for new thoughts on how the stones might have been transported to the Stonehenge area.