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Glynea Colliery is a post-medieval and modern coal mine situated in Wales above the South Wales Upper Coal Measures Formation. This geological sequence, laid down during the Westphalian period, comprises a complex stratigraphy of mudstone, siltstone and sandstone interspersed with workable coal seams, ironstone bands and ferricrete layers. Such varied bedrock supported sustained coal extraction across South Wales from the eighteenth century onwards.
The colliery exploited the coal-bearing strata that made South Wales one of Britain's most important coalfields. The Upper Coal Measures' mudstone and siltstone provided roof and floor to the coal seams, whilst the ironstone bodies were themselves valuable resources for the regional iron industry. The ferricrete, an iron-enriched hardpan, formed a natural capping to certain horizons.
Now protected by Cadw under reference CM262, Glynea Colliery survives as a monument to the industrial heritage of South Wales. The site bears witness to the intensive exploitation of mineral resources that transformed the landscape and economy of the region during the modern period, leaving physical evidence of the deep mining operations and surface workings characteristic of the coalfield's development.
Glynea Colliery is a scheduled monument protected by Cadw under reference CM262. View the official record →
Glynea Colliery is a post-medieval and modern coal mine situated in Wales above the South Wales Upper Coal Measures Formation. It is designated a Scheduled Ancient Monument by Cadw under reference CM262.
Glynea Colliery dates from the post medieval/modern period, and is classified as a coal mine. It is one of over 32,000 scheduled monuments protected across the UK.
Glynea Colliery 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 CM262.
Several scheduled monuments lie within 10 km, including Tooth Cave, Llethrid (8.4 km), Cat Hole Cave (9.2 km), Parc le Breos Limekiln and Quarries (9.3 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Glynea Colliery'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.
Glynea Colliery 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.