In the early 1920s HH Thomas showed through petrographic analysis that many of the bluestones had come from the Preseli Hills, and in 2005 work led by Timothy Darvill and Geoff Wainwright supported the idea that Carn Menyn was the primary quarry.

This is disputed by others, and Williams-Thorpe and others from the Open University have suggested that the Stonehenge bluestones came from at least twenty different places, with the Carn Goedog dyke about one mile to the west as the most likely source for the spotted dolerites.

Survey work between 2002 and 2004 by the Strumble-Preseli Ancient Communities and Environment Study (SPACES) recorded an enclosure on the upper part of the outcrop consisting of a steep-sided promontory with a bank of stones across its neck.

However, this stone was not used preferentially in megalithic or ritual structures—stone from all of the outcrops or tors on Mynydd Preseli has been used in buildings and field boundaries, so long as access by horse-drawn sleds and carts was possible.

The same year, the then Archdruid of the Welsh Gorsedd of Bards, Robyn Lewis, wrote to the Daily Telegraph proposing that the Bluestones be returned from Stonehenge to the Preseli Hills.