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Craig Cwmbychan cairn is a prehistoric round cairn located in Wales and protected by Cadw under reference CN364. The monument sits upon bedrock of Ordovician to Silurian age, specifically an unnamed igneous intrusion of felsic rock formed during the Silurian period. This geological foundation of light-coloured crystalline rock would have been a prominent feature of the local landscape when the cairn was constructed, and may have influenced its siting and visibility within the upland terrain.
Round cairns of this type typically served as burial monuments in prehistoric Wales, constructed by stacking stone across the ground surface to create a substantial mound. The felsic bedrock beneath Craig Cwmbychan—harder and more resistant than the surrounding sedimentary strata—provided a stable base for such construction. The choice of location on this igneous outcrop may reflect the communities' awareness of the local geology and their preference for elevated, conspicuous positions.
Today, Craig Cwmbychan remains a testament to prehistoric burial practice and monumental construction in the Welsh uplands. Its preservation as a protected monument allows visitors and researchers to understand how ancient communities used their landscape, selecting suitable ground and durable stone to create monuments that have endured for millennia. The cairn's relationship to its distinctive geological setting provides insight into the practical and perhaps symbolic considerations that shaped prehistoric settlement and commemoration.
Craig Cwmbychan cairn is a scheduled monument protected by Cadw under reference CN364. View the official record →
Craig Cwmbychan cairn is a prehistoric round cairn located in Wales and protected by Cadw under reference CN364.
Craig Cwmbychan cairn dates from the prehistoric period, and is classified as a round cairn. It is one of over 32,000 scheduled monuments protected across the UK.
Craig Cwmbychan 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 CN364.
Several scheduled monuments lie within 10 km, including Gilfach Copper Mine (7.8 km), Cwm Llefrith cairn (8.1 km), Mynydd Graig Goch round cairn (8.3 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Craig Cwmbychan 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.
Craig Cwmbychan cairn stands on Unnamed Igneous Intrusion, Ordovician To Silurian, bedrock that formed in the Silurian. The rock here is felsic-rock.