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Mynydd y Garn Lluest East is a post-medieval or modern enclosure situated in Wales on Dinantian bedrock. The limestone and subordinate sandstone and argillaceous rocks beneath the site date to the Mississippian period, forming the foundation of this upland landscape. This geological substrate has shaped settlement patterns and land use across the region for centuries.
The enclosure represents a phase of agricultural organisation typical of post-medieval upland Wales, when pastoral and subsistence farming dominated the economy. Such enclosed fields were often created by clearing or formalising existing land boundaries, taking advantage of the relatively open terrain that characterises this limestone plateau. The monumentalised form visible today reflects the permanence that farming communities sought to impose upon this demanding landscape.
The site is protected by Cadw, the Welsh Historic Monuments agency, under reference BR409, acknowledging its value as evidence of rural land management and settlement history. The survival of the enclosure's earthworks demonstrates the durability of field systems constructed across limestone bedrock, where stone boundaries and banks weathered the Welsh upland climate to remain visible in the modern landscape.
Mynydd y Garn Lluest East is a scheduled monument protected by Cadw under reference BR409. View the official record →
Mynydd y Garn Lluest East is a post-medieval or modern enclosure situated in Wales on Dinantian bedrock. It is designated a Scheduled Ancient Monument by Cadw under reference BR409.
Mynydd y Garn Lluest East dates from the post medieval/modern period, and is classified as a enclosure. It is one of over 32,000 scheduled monuments protected across the UK.
Mynydd y Garn Lluest East 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 BR409.
Several scheduled monuments lie within 10 km, including Dinas Silica Mine (7.2 km), Craig y Ddinas Hillfort (7.2 km), Site of Hirwaun Ironworks (7.9 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Mynydd y Garn Lluest East'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.
Mynydd y Garn Lluest East stands on Dinantian Rocks (Undifferentiated), bedrock that formed in the Mississippian. The rock here is limestone with subordinate sandstone and argillaceous rocks.