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Carn-y-Pigwn Round Cairn is a prehistoric round cairn situated in Wales and scheduled under Cadw protection as monument GM372. The structure was built upon bedrock of the South Wales Upper Coal Measures Formation, comprising mudstone, siltstone, sandstone, coal, ironstone and ferricrete deposits laid down during the Westphalian period.
Round cairns of this type typically date to the Bronze Age and served as burial monuments or territorial markers within the upland landscape. The specific geology of the site—with its mixed sedimentary sequence and iron-rich ferricrete—would have provided suitable stone for cairn construction, whilst the coal seams and ironstone bands visible in the bedrock geology characterise the wider South Wales coalfield region.
The cairn's survival within the Welsh landscape testifies to the enduring visibility of Bronze Age burial practices in the upland terrain. Now protected as a scheduled ancient monument, Carn-y-Pigwn preserves an important record of prehistoric settlement patterns and burial ritual in this geologically distinctive part of Wales.
Carn-y-Pigwn Round Cairn is a scheduled monument protected by Cadw under reference GM372. View the official record →
Carn-y-Pigwn Round Cairn is a prehistoric round cairn situated in Wales and scheduled under Cadw protection as monument GM372. It is designated a Scheduled Ancient Monument by Cadw under reference GM372.
Carn-y-Pigwn 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.
Carn-y-Pigwn 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 GM372.
Several scheduled monuments lie within 10 km, including Twyn y Bridallt Roman Camp (1.3 km), Mynydd Ty'n-tyle cairns (2.2 km), Ring Cairn 350m W of Penrhiw Caradoc, Llanwonno (3.1 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Carn-y-Pigwn 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.
Carn-y-Pigwn Round Cairn stands on South Wales Upper Coal Measures Formation, bedrock that formed in the Westphalian. The rock here is mudstone, siltstone, sandstone, coal, ironstone and ferricrete.