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Mynydd Dyfnant Stone Alignment is a prehistoric stone alignment located in Wales and protected by Cadw under reference MG134. The monument consists of a linear arrangement of stones placed upon bedrock formed from Wenlock Rocks, a Silurian formation of sandstone and conglomerate laid down during the Paleozoic era. This underlying geology of hard, interbedded stone would have provided a stable foundation and likely supplied suitable stone for the alignment's construction, as such outcrops were readily available across the upland landscape.
Stone alignments of this type represent some of Britain's most enigmatic prehistoric monuments, typically dating to the Bronze Age or earlier. Their purpose remains debated among archaeologists, with theories ranging from territorial or ceremonial markers to astronomical observations or ritual processional routes. The alignment's positioning on high moorland terrain suggests a location of significance in the prehistoric landscape.
The monument's survival to the present day, and its formal protection by the Welsh heritage body Cadw, reflects its archaeological importance as evidence of prehistoric activity and landscape organisation. The arrangement provides insights into how communities organised their relationship with the upland terrain during prehistory, using the natural stone resources available within the Wenlock bedrock formation.
Mynydd Dyfnant Stone Alignment is a scheduled monument protected by Cadw under reference MG134. View the official record →
Mynydd Dyfnant Stone Alignment is a prehistoric stone alignment located in Wales and protected by Cadw under reference MG134.
Mynydd Dyfnant Stone Alignment dates from the prehistoric period, and is classified as a stone alignment. It is one of over 32,000 scheduled monuments protected across the UK.
Mynydd Dyfnant Stone Alignment 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 MG134.
Several scheduled monuments lie within 10 km, including Tryfel Cairns and Stone Setting (1.5 km), Gogerddan Camp (3.8 km), Cae'r Lloi Round Barrow (4.5 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Mynydd Dyfnant Stone Alignment'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.
Mynydd Dyfnant Stone Alignment stands on Wenlock Rocks (Undifferentiated), bedrock that formed in the Wenlock. The rock here is sandstone and conglomerate, interbedded.