Aberystwyth University-led research has shared new findings clarifying that the enigmatic "Newall boulder" from Stonehenge was transported by Neolithic people, not by glacial transport, from Craig Rhos-y-Felin in Wales.

Researchers conclude that the Newall boulder is a piece of Craig Rhos-y-Felin rhyolite, most likely broken from a monolith such as Stone 32d. All mineralogical, geochemical, and field data support human transport to Stonehenge by Neolithic people with no evidence to support glacial movement of the stone.

In discrediting the glacial hypothesis for the presence of the Newall boulder, the research bolsters the case for all of the bluestones on the plain to be the result of ancient human efforts.