© Mapbox · © OpenStreetMap contributors · Boundary data © Cadw
Ring Cairn and Round Cairn on Southern Side of Mynydd-y-Glog is a prehistoric ring cairn situated on the elevated moorland of Wales. The monument rests on bedrock of the Millstone Grit Group, a hard, erosion-resistant sequence of mudstone, siltstone and sandstone formed during the Namurian period of the Carboniferous. This substantial geological foundation would have provided durable stone for cairn construction and helped the monument survive millennia of exposure to upland weather.
The site comprises two distinct stone structures: a ring cairn, characterised by a roughly circular arrangement of stones surrounding a central void, and an adjacent round cairn. Both forms are typical of Bronze Age burial practices across upland Britain, though ring cairns may also have served ceremonial functions. The moorland setting on Mynydd-y-Glog is characteristic of Bronze Age monumental landscapes, where visibility and prominence across the open terrain were significant considerations in placement.
The monument is protected by Cadw, the Welsh Historic Monuments service, under reference GM524. This designation recognises its archaeological and historical importance as evidence of prehistoric settlement and burial practices in Wales. The surviving stone structures remain visible within the upland landscape, offering insight into the communities who built and used these monuments during the Bronze Age.
Ring Cairn and Round Cairn on Southern Side of Mynydd-y-Glog is a scheduled monument protected by Cadw under reference GM524. View the official record →
Ring Cairn and Round Cairn on Southern Side of Mynydd-y-Glog is a prehistoric ring cairn situated on the elevated moorland of Wales. It is designated a Scheduled Ancient Monument by Cadw under reference GM524.
Ring Cairn and Round Cairn on Southern Side of Mynydd-y-Glog dates from the prehistoric period, and is classified as a ring cairn. It is one of over 32,000 scheduled monuments protected across the UK.
Ring Cairn and Round Cairn on Southern Side of Mynydd-y-Glog 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 GM524.
Several scheduled monuments lie within 10 km, including Gadlys Ironworks (Remains of Blast Furnace) (5.7 km), Rhondda Fach Cairn (6.3 km), Castell Nos (7.9 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Ring Cairn and Round Cairn on Southern Side of Mynydd-y-Glog'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.
Ring Cairn and Round Cairn on Southern Side of Mynydd-y-Glog stands on Millstone Grit Group [See Also Migr], bedrock that formed in the Namurian. The rock here is mudstone, siltstone and sandstone.