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Tan y Clawdd Camp is a prehistoric hillfort situated in Wales on bedrock of Wenlock geology. The underlying strata comprise mudstone, siltstone and sandstone of Wenlock age, rocks that formed during the Silurian period and now underlie the upland terrain where the camp stands. This solid foundation of Wenlock Rock would have provided a stable base for the ramparts and internal structures typical of Iron Age hillforts, whilst the exposed ridges and slopes characteristic of such geology shaped the natural defensive advantages the site exploited.
The camp's defensive layout follows the contours of its Wenlock substrate, with earthen ramparts positioned to command views across the surrounding landscape. The mixed lithology of mudstone and sandstone would have offered both material for construction and areas of harder rock suitable for structural support. The site represents a significant phase of Iron Age settlement and territorial control in Wales.
Tan y Clawdd Camp is protected as a scheduled monument under Cadw reference MG131, recognising its archaeological importance and the need to preserve its earthworks and any subsurface deposits that may survive. The monument remains a valuable record of prehistoric occupation patterns in Wales.
Tan y Clawdd Camp is a scheduled monument protected by Cadw under reference MG131. View the official record →
Tan y Clawdd Camp is a prehistoric hillfort situated in Wales on bedrock of Wenlock geology. It is designated a Scheduled Ancient Monument by Cadw under reference MG131.
Tan y Clawdd Camp dates from the prehistoric period, and is classified as a hillfort. It is one of over 32,000 scheduled monuments protected across the UK.
Tan y Clawdd Camp 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 MG131.
Several scheduled monuments lie within 10 km, including Site E of Plas-Llwyn (revealed by aerial photography) (6.6 km), Maen Beuno (6.7 km), Lower Min-y-Llyn Castle Mound (7.2 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Tan y Clawdd Camp'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.
Tan y Clawdd Camp stands on Wenlock Rocks (Undifferentiated), bedrock that formed in the Wenlock. The rock here is mudstone, siltstone and sandstone.