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Offa's Dyke: Section S from Pen y Coed is an early medieval linear earthwork running through Wales. Built in the 8th century, the dyke formed a substantial frontier defence stretching across the Welsh borderlands. This particular section near Pen y Coed sits upon bedrock of the Pennine and South Wales Middle Coal Measures Formation, a complex geology of mudstone, siltstone, sandstone with seams of coal and ironstone deposited during the Moscovian period. The underlying ferricrete, an iron-rich crust formed by weathering, would have presented considerable difficulty during the dyke's original construction. The earthwork consists of a substantial bank with a ditch on its western face, representing a significant engineering achievement across challenging terrain. The monument is protected by Cadw, the Welsh heritage authority, under reference DE112.
Offa's Dyke: Section S from Pen y Coed is a scheduled monument protected by Cadw under reference DE112. View the official record →
Offa's Dyke: Section S from Pen y Coed is an early medieval linear earthwork running through Wales. It is designated a Scheduled Ancient Monument by Cadw under reference DE112.
Offa's Dyke: Section S from Pen y Coed dates from the early medieval period, and is classified as a linear earthwork. It is one of over 32,000 scheduled monuments protected across the UK.
Offa's Dyke: Section S from Pen y Coed 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 DE112.
Several scheduled monuments lie within 10 km, including Offa's Dyke: Section S of Bryn yr Owen Farm (6.9 km), Offa's Dyke: Sections N & S of Bryn yr Owen Colliery (7.3 km), Wat's Dyke: Section extending from Erddig Park to Middle Sontley (7.7 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Offa's Dyke: Section S from Pen y Coed'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.
Offa's Dyke: Section S from Pen y Coed stands on Pennine Middle Coal Measures Formation And South Wales Middle Coal Measures Formation (Undifferentiated), bedrock that formed in the Moscovian. The rock here is mudstone, siltstone, sandstone, coal, ironstone and ferricrete.