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Crug Tarw is a prehistoric round barrow located in Wales and protected by Cadw under reference CM103. The monument sits upon Ashgill Rocks, a bedrock of undifferentiated mudstone, siltstone and sandstone formed during the Ashgill period. This geological foundation would have presented distinctive working conditions for the Neolithic or Bronze Age communities who constructed the barrow, with the underlying sedimentary rocks offering both practical constraints and available stone for monument building.
Round barrows of this type served as burial mounds for individual or family groups, typically constructed as earthen tumuli with stone or timber internal structures. The Ashgill geology surrounding Crug Tarw would have influenced the choice of materials available for its construction and the appearance of the finished monument against the local landscape.
The barrow's preservation as a scheduled monument reflects its significance as evidence of prehistoric burial practice and social organisation. Such monuments are fundamental to understanding settlement patterns and population distribution across Wales during the later prehistoric period. The specific topography and geology of Crug Tarw's location contribute to its individual character within the broader corpus of Welsh round barrows.
Crug Tarw is a scheduled monument protected by Cadw under reference CM103. View the official record →
Crug Tarw is a prehistoric round barrow located in Wales and protected by Cadw under reference CM103.
Crug Tarw 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 Tarw 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 CM103.
Several scheduled monuments lie within 10 km, including Crug Gwyn Round Barrow (3.9 km), Crug Fach Round Barrow (4 km), Garreg Wen Standing Stone (5.5 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Crug Tarw'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 Tarw stands on Ashgill Rocks (Undifferentiated), bedrock that formed in the Ashgill. The rock here is mudstone, siltstone and sandstone.