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Carnau'r Gareg Las is a prehistoric round cairn located in Wales and protected by Cadw as a scheduled monument under reference CM258. The cairn sits upon bedrock of the Millstone Grit Group, a sequence of mudstone, siltstone and sandstone laid down during the Namurian period of the Carboniferous era. This solid geological foundation would have provided a stable base for the monument's construction.
Round cairns of this type typically date to the Bronze Age and served as burial monuments, often marking the graves of individuals of status within their communities. The form—a roughly circular heap of stones—represents one of the most enduring monument types across upland Britain and Wales, where stone was the readily available building material.
The survival of Carnau'r Gareg Las in the Welsh landscape, despite millennia of weathering and land use, speaks to the durability of these stone monuments. Like many cairns of its age, it remains an important archaeological record of prehistoric burial practice and settlement patterns in its locality.
Carnau'r Gareg Las is a scheduled monument protected by Cadw under reference CM258. View the official record →
Carnau'r Gareg Las is a prehistoric round cairn located in Wales and protected by Cadw as a scheduled monument under reference CM258.
Carnau'r Gareg Las 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.
Carnau'r Gareg Las 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 CM258.
Several scheduled monuments lie within 10 km, including Cwm Twrch settlement and limekiln (3.4 km), Cwm Twrch settlement (4.7 km), Llwyncwmstabl round cairn (5.1 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Carnau'r Gareg Las'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.
Carnau'r Gareg Las stands on Millstone Grit Group [See Also Migr], bedrock that formed in the Namurian. The rock here is mudstone, siltstone and sandstone.