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Allt Gethin Round Cairn is a prehistoric round cairn located in Wales and protected by Cadw under reference MG303. The monument stands on bedrock of Wenlock rocks, geological formations dating to the Silurian period and composed of interbedded sandstone and conglomerate. This solid foundation of local stone provided both material and stable ground for the cairn's construction.
Round cairns of this type typically date to the Bronze Age, between approximately 2200 and 800 BC, and served as burial monuments for individual or family groups. The substantial bedrock beneath Allt Gethin would have allowed builders to construct the cairn with confidence, anchoring the stones firmly into the landscape. The Wenlock sandstone and conglomerate exposed or available nearby may have supplied material for the cairn itself.
The monument remains a significant record of prehistoric funerary practice in Wales. Its survival and protection reflect the archaeological importance of such cairns in understanding settlement patterns, social organisation and burial customs of Bronze Age communities. The specific geological setting at Allt Gethin connects the monument directly to its local landscape and the resources available to those who built it.
Allt Gethin Round Cairn is a scheduled monument protected by Cadw under reference MG303. View the official record →
Allt Gethin Round Cairn is a prehistoric round cairn located in Wales and protected by Cadw under reference MG303.
Allt Gethin Round 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.
Allt Gethin Round 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 MG303.
Several scheduled monuments lie within 10 km, including Polyn y Groes Ddu Round Cairn II (3.7 km), Polyn y Groes-Ddu Round Barrow, Waun Lluest Owain (3.8 km), Domen Ddu Round Barrow (4.7 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Allt Gethin Round 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.
Allt Gethin Round Cairn stands on Wenlock Rocks (Undifferentiated), bedrock that formed in the Wenlock. The rock here is sandstone and conglomerate, interbedded.