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Afon Hyddgen stone row is a prehistoric stone row located in Wales, protected as a scheduled monument by Cadw under reference MG309. The monument consists of stones arranged in linear form, a ceremonial or territorial marker typical of Bronze Age ritual landscapes across Britain and Ireland. The row sits upon bedrock composed of Ashgill rocks—undifferentiated mudstone, siltstone and sandstone deposits formed during the Ashgill geological period in the late Ordovician. This solid foundation of fine sedimentary stone would have presented both practical challenges and opportunities for prehistoric communities selecting and positioning megaliths at this location. The geology underlying Afon Hyddgen reflects the ancient marine environment that shaped the Welsh landscape millions of years before the monument's construction, making the stone row part of a palimpsest of natural and cultural heritage spanning deep geological time and human prehistory.
Afon Hyddgen stone row is a scheduled monument protected by Cadw under reference MG309. View the official record →
Afon Hyddgen stone row is a prehistoric stone row located in Wales, protected as a scheduled monument by Cadw under reference MG309.
Afon Hyddgen 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.
Afon Hyddgen 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 MG309.
Several scheduled monuments lie within 10 km, including Llys Arthur, Dyffryn-Castell (7 km), Dinas SW of Aber-Peithnant (7.2 km), Nant Geifaes Cairn (7.8 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Afon Hyddgen 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.
Afon Hyddgen stone row stands on Ashgill Rocks (Undifferentiated), bedrock that formed in the Ashgill. The rock here is mudstone, siltstone and sandstone.