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Carn Pantmaenllwyd cairn is a prehistoric ring cairn located in Wales and protected by Cadw under reference BR379. Ring cairns of this type typically date to the Bronze Age and consist of a circular bank of stones surrounding a central open space, distinguishing them from the solid mounds of earlier passage graves and round barrows. The monument sits upon bedrock of Ashgill Rocks, undifferentiated mudstone, siltstone and sandstone deposits formed during the Ashgill period of the Ordovician era, creating a challenging foundation of soft, weathered stone.
The site's geology shaped both its construction and preservation. The local mudstone and siltstone would have provided suitable building material whilst also determining drainage patterns across the upland landscape where such monuments were characteristically placed. The exposure and weathering of these Ordovician deposits mean the cairn's stones have been subject to significant natural processes over millennia.
Ring cairns served ritual and commemorative functions within Bronze Age communities. The open central area may have been used for ceremonies or contained a burial deposit. Carn Pantmaenllwyd remains an important record of prehistoric funerary practice and land use in the Welsh uplands, its survival testament to the enduring nature of stone construction on this ancient bedrock.
Carn Pantmaenllwyd cairn is a scheduled monument protected by Cadw under reference BR379. View the official record →
Carn Pantmaenllwyd cairn is a prehistoric ring cairn located in Wales and protected by Cadw under reference BR379.
Carn Pantmaenllwyd cairn dates from the prehistoric period, and is classified as a ring cairn. It is one of over 32,000 scheduled monuments protected across the UK.
Carn Pantmaenllwyd cairn 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 BR379.
Several scheduled monuments lie within 10 km, including Earthworks SW of Church (3.5 km), Standing Stone SSE of Dol-y-Felin (4.4 km), Bryn ring cairn (6.1 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Carn Pantmaenllwyd cairn'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.
Carn Pantmaenllwyd cairn stands on Ashgill Rocks (Undifferentiated), bedrock that formed in the Ashgill. The rock here is mudstone, siltstone and sandstone.