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Croes Heol y Splott Round Barrow is a prehistoric round barrow located in Wales and protected by Cadw under reference GM187. The monument sits upon bedrock of the Lias Group, a geological formation laid down during the Aalenian period comprising mudstone, siltstone, limestone and sandstone. This solid foundation of mixed sedimentary rocks would have influenced both the construction and preservation of the barrow's earthwork.
Round barrows of this type typically date to the Bronze Age and served as burial monuments for prominent individuals or family groups. The Lias Group bedrock underlying the site, with its mixture of clay and stone, would have provided variable ground conditions during construction, potentially affecting how the barrow was raised and how the internal structures were arranged.
The monument's survival to the present day reflects both its inherent durability and its designation as a protected heritage asset. Its location within the Welsh landscape, founded upon these ancient sedimentary rocks, connects it to the broader pattern of Bronze Age burial practice across Britain and the enduring relationship between prehistoric communities and their geology.
Croes Heol y Splott Round Barrow is a scheduled monument protected by Cadw under reference GM187. View the official record →
Croes Heol y Splott Round Barrow is a prehistoric round barrow located in Wales and protected by Cadw under reference GM187.
Croes Heol y Splott 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.
Croes Heol y Splott 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 GM187.
Several scheduled monuments lie within 10 km, including St. Illtud's Church, Early Medieval Cross, Cross Shafts and Pillar (2.7 km), Llantwit Major Gatehouse (2.7 km), The Chantry House (2.7 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Croes Heol y Splott 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.
Croes Heol y Splott Round Barrow stands on Lias Group, bedrock that formed in the Aalenian. The rock here is mudstone, siltstone, limestone and sandstone.