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Mynydd Bach-Trecastell Round Cairn is a prehistoric round cairn situated in Wales and protected by Cadw under reference BR142. The monument stands on bedrock composed of Pridoli rocks—undifferentiated mudstone, siltstone and sandstone formed during the Pridoli epoch. Round cairns of this type typically functioned as burial monuments during the Bronze Age, constructed by stacking stone to create a prominent mound that served both as a tomb and a territorial marker across the landscape.
The underlying geology of Pridoli rocks would have provided a ready source of suitable stone for cairn construction, though such monuments were often built from readily available surface materials. The monument's survival on upland terrain reflects the typically marginal nature of Bronze Age settlement and burial practices in exposed Welsh landscapes. Its protected status recognises the archaeological importance of understanding prehistoric funerary practices and settlement patterns in this region.
Mynydd Bach-Trecastell Round Cairn is a scheduled monument protected by Cadw under reference BR142. View the official record →
Mynydd Bach-Trecastell Round Cairn is a prehistoric round cairn situated in Wales and protected by Cadw under reference BR142.
Mynydd Bach-Trecastell 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.
Mynydd Bach-Trecastell 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 BR142.
Several scheduled monuments lie within 10 km, including Troed Rhiw Wen Prehistoric Standing Stone (5.3 km), Garn Las ring cairn (6 km), Garn Las platform cairn (6.2 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Mynydd Bach-Trecastell 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.
Mynydd Bach-Trecastell Round Cairn stands on Pridoli Rocks (Undifferentiated), bedrock that formed in the Pridoli. The rock here is mudstone, siltstone and sandstone.