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Merthyr Mawr Warren is a prehistoric unclassified site in Wales, protected by Cadw under reference GM432. The monument lies upon Dinantian bedrock, a geological formation of limestone with subordinate sandstone and argillaceous rocks that originated during the Mississippian period. This stable underlying geology would have made the location suitable for occupation or activity during prehistoric times, when the exposed limestone and surrounding landscape provided resources and shelter to early communities.
The classification as unclassified reflects uncertainty about the site's precise function or chronological placement within the prehistoric sequence. Such designations typically indicate features that cannot be confidently assigned to a single monument category, whether due to erosion, incomplete survival, or ambiguous archaeological signatures. The site's preservation under statutory protection recognises its potential significance for understanding prehistoric settlement and land use patterns in the region.
The Mississippian limestone bedrock across South Wales influenced the distribution of early human activity, as such geology often creates distinctive topography and water sources. Merthyr Mawr Warren's setting within this landscape, combined with its protected status, makes it an important element in the broader archaeological record of prehistoric Wales.
Merthyr Mawr Warren is a scheduled monument protected by Cadw under reference GM432. View the official record →
Merthyr Mawr Warren is a prehistoric unclassified site in Wales, protected by Cadw under reference GM432.
Merthyr Mawr Warren dates from the prehistoric period, and is classified as a unclassified site. It is one of over 32,000 scheduled monuments protected across the UK.
Merthyr Mawr Warren 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 GM432.
Several scheduled monuments lie within 10 km, including Heol y Mynydd Round Barrow (2.5 km), St Bride's Major Churchyard Cross (3.3 km), Dunraven Castle Hillfort (4.8 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Merthyr Mawr Warren'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.
Merthyr Mawr Warren stands on Dinantian Rocks (Undifferentiated), bedrock that formed in the Mississippian. The rock here is limestone with subordinate sandstone and argillaceous rocks.