© Mapbox · © OpenStreetMap contributors · Boundary data © Cadw
Crug Glas Round Barrow is a prehistoric earthwork built upon the soft rocks of the Ashgill series, where mudstone, siltstone and sandstone form an unstable foundation prone to weathering. The barrow was constructed in the customary fashion of later Neolithic and Bronze Age communities across Wales, serving as a communal or elite burial monument. Its siting on this geological base has created distinctive preservation challenges; the Ashgill bedrock's susceptibility to erosion means the barrow's surviving form reflects both original construction and thousands of years of natural degradation. The monument lies protected as a scheduled ancient monument under Cadw's management, reflecting its recognised importance to Wales's archaeological heritage.
Crug Glas Round Barrow is a scheduled monument protected by Cadw under reference CM113. View the official record →
Crug Glas Round Barrow is a prehistoric earthwork built upon the soft rocks of the Ashgill series, where mudstone, siltstone and sandstone form an unstable foundation prone to weathering. It is designated a Scheduled Ancient Monument by Cadw under reference CM113.
Crug Glas Round Barrow dates from the prehistoric period, and is classified as a round barrow. It is one of over 32,000 scheduled monuments protected across the UK.
Crug Glas Round Barrow 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 CM113.
Several scheduled monuments lie within 10 km, including Cross-Incised Stone in Churchyard (5.2 km), Ffos-y-Maen Standing Stone (5.7 km), Defended Enclosure 300m W of Pen y Gar (5.8 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Crug Glas Round Barrow'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.
Crug Glas Round Barrow stands on Ashgill Rocks (Undifferentiated), bedrock that formed in the Ashgill. The rock here is mudstone, siltstone and sandstone.