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Mynydd Carn-Goch Roman Earthworks is a Roman practice camp situated on the South Wales Upper Coal Measures, a geological formation of Westphalian age comprising mudstone, siltstone, sandstone, coal, ironstone and ferricrete. The camp's earthen ramparts and ditches, characteristic of temporary Roman military structures, are cut into and constructed upon this mixed substrate of coal-bearing strata. Practice camps such as this were built by Roman soldiers during training exercises to develop skills in fortification and camp construction, and typically feature the distinctive rectangular layout with corner gateways that define the genre.
Located in Wales, Mynydd Carn-Goch exemplifies the Roman military presence in Britain beyond the frontier strongholds. The underlying ferricrete and ironstone geology would have presented particular challenges to the soldiers excavating ditches and raising ramparts by hand. The camp's survival as earthworks rather than stone foundations reflects its temporary nature and the local availability of soil suitable for rampart construction.
The site is protected by Cadw, Wales's historic monuments service, under reference GM269, ensuring its preservation as a testament to Roman military training and engineering practices in the Welsh landscape.
Mynydd Carn-Goch Roman Earthworks is a scheduled monument protected by Cadw under reference GM269. View the official record →
Mynydd Carn-Goch Roman Earthworks is a Roman practice camp situated on the South Wales Upper Coal Measures, a geological formation of Westphalian age comprising mudstone, siltstone, sandstone, coal, ironstone and ferricrete. It is designated a Scheduled Ancient Monument by Cadw under reference GM269.
Mynydd Carn-Goch Roman Earthworks dates from the roman period, and is classified as a practice camp. It is one of over 32,000 scheduled monuments protected across the UK.
Mynydd Carn-Goch Roman Earthworks 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 GM269.
Several scheduled monuments lie within 10 km, including Clyne Wood Colliery Steam Winding Machine (5.2 km), Clyne Valley Shaft Mounds (5.2 km), Clyne Wood Coal Level (5.9 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Mynydd Carn-Goch Roman Earthworks'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 Carn-Goch Roman Earthworks stands on South Wales Upper Coal Measures Formation, bedrock that formed in the Westphalian. The rock here is mudstone, siltstone, sandstone, coal, ironstone and ferricrete.