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Cerrig Lladron stone row is a prehistoric linear arrangement of stones positioned on the upland terrain of Wales, where bedrock of Silurian mafic igneous rock forms the foundation beneath the monument. The dark, coarse-grained geology of this intrusive igneous formation is characteristic of the ancient volcanic activity that shaped this region during the Ordovician and Silurian periods, some 440 million years ago. Such underlying geology would have provided prehistoric communities with accessible stone suitable for monument construction.
The monument consists of stones arranged in a deliberate line across the landscape, a form of ceremonial or territorial marker typical of Neolithic and Bronze Age societies across Britain and Ireland. The function of such rows remains subject to interpretation, though they are often associated with ritual practices, astronomical observation, or processional routes connected to burial sites and sacred locations.
Cerrig Lladron is protected as a scheduled ancient monument by Cadw, the Welsh heritage organisation, under reference PE496. This designation recognises its archaeological significance and ensures the preservation of this Bronze Age or Neolithic structure, allowing the linear arrangement of stones to be studied as evidence of Wales's prehistoric cultural landscape.
Cerrig Lladron stone row is a scheduled monument protected by Cadw under reference PE496. View the official record →
Cerrig Lladron stone row is a prehistoric linear arrangement of stones positioned on the upland terrain of Wales, where bedrock of Silurian mafic igneous rock forms the foundation beneath the monument. It is designated a Scheduled Ancient Monument by Cadw under reference PE496.
Cerrig Lladron stone row dates from the prehistoric period, and is classified as a stone row. It is one of over 32,000 scheduled monuments protected across the UK.
Cerrig Lladron stone row is a Scheduled Ancient Monument, legally protected by Cadw — the body responsible for designating and safeguarding heritage sites in Wales. The official designation reference is PE496.
Several scheduled monuments lie within 10 km, including Hill Slope Enclosure, 400m WNW of Parc Robert (6.1 km), Castell Vorlan (6.2 km), Velindre Pillar-Cross (6.8 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Cerrig Lladron stone row's history, each drawn from the record and mapped to the exact spot:
Every location is different. Not every section appears for every place, only what the historical record actually holds turns up in a report.
Cerrig Lladron stone row stands on Unnamed Igneous Intrusion, Ordovician To Silurian, bedrock that formed in the Silurian. The rock here is mafic igneous-rock.