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Y Glog Fawr cairn is a prehistoric round cairn located in Wales and protected as a scheduled monument by Cadw under reference RD213. The monument sits on bedrock composed of Llandovery Rocks, undifferentiated strata of mudstone, siltstone and sandstone deposited during the Llandovery period of the Silurian. This geological foundation provided the raw material for the cairn's construction and has shaped the landscape surrounding the site.
Round cairns of this type were constructed during the Bronze Age as funerary monuments, built by piling stones over burial deposits. The specific geology of Y Glog Fawr's location, with its readily available stone from the local bedrock formations, would have made monument construction feasible for the communities who built it. The cairn represents an important record of prehistoric burial practices and territorial settlement patterns in Wales.
Today, Y Glog Fawr remains a visible element of Wales's archaeological heritage, preserved in the landscape where it was built millennia ago. As a scheduled monument under Cadw's protection, the site is safeguarded from damage and unauthorised disturbance, allowing it to continue contributing to our understanding of prehistoric Welsh society and funerary traditions.
Y Glog Fawr cairn is a scheduled monument protected by Cadw under reference RD213. View the official record →
Y Glog Fawr cairn is a prehistoric round cairn located in Wales and protected as a scheduled monument by Cadw under reference RD213.
Y Glog Fawr 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.
Y Glog Fawr 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 RD213.
Several scheduled monuments lie within 10 km, including Ring Cairn on Esgair Ceiliog (6 km), Hafotau Settlement on Bryn Melys (6.2 km), Saith-Maen Standing Stones (6.5 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Y Glog Fawr 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.
Y Glog Fawr cairn stands on Llandovery Rocks (Undifferentiated), bedrock that formed in the Llandovery. The rock here is mudstone, siltstone and sandstone.