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Offa's Dyke is an early medieval linear earthwork that forms part of the frontier construction attributed to Offa of Mercia in the late 8th century. This particular section extends from a point 90 metres south of Chirbury Road to the southern boundary of Nant-Cribau Park, marking a crucial portion of the longer earthwork that once delineated the border between Mercia and Wales. The monument is protected by Cadw as a scheduled ancient monument under reference MG036.
The dyke in this location traverses bedrock composed of Caradoc Rocks, an undifferentiated formation of mudstone, siltstone and sandstone laid down during the Caradocian period. These consolidated sediments provided a relatively stable foundation for the construction of the linear earthwork, though the varying competence of the underlying strata would have influenced the final form and preservation of the ditch and bank structure across the landscape.
This section of Offa's Dyke survives as one of the most substantial early medieval boundary monuments in Britain, commanding the local terrain as it runs across the Wales-England border. The earthwork's prominence in the archaeological record testifies to the considerable labour investment in its construction and the political significance of the frontier it demarcated during the Anglo-Saxon period.
Offa's Dyke: Section from point 90m S of Chirbury Road to S Boundary of Nant-Cribau Park is a scheduled monument protected by Cadw under reference MG036. View the official record →
Offa's Dyke is an early medieval linear earthwork that forms part of the frontier construction attributed to Offa of Mercia in the late 8th century. It is designated a Scheduled Ancient Monument by Cadw under reference MG036.
Offa's Dyke: Section from point 90m S of Chirbury Road to S Boundary of Nant-Cribau Park 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 from point 90m S of Chirbury Road to S Boundary of Nant-Cribau Park 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 MG036.
Several scheduled monuments lie within 10 km, including Offa's Dyke: Section from Dudston Covert, Lymore to Lack Brook, Churchstoke (6.8 km), Cefn Llan Hillfort (6.9 km), Offa's Dyke: section NW of Ditches Farm Also in Powys: Wales (7.1 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Offa's Dyke: Section from point 90m S of Chirbury Road to S Boundary of Nant-Cribau Park'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 from point 90m S of Chirbury Road to S Boundary of Nant-Cribau Park stands on Caradoc Rocks (Undifferentiated), bedrock that formed in the Caradocian. The rock here is mudstone, siltstone and sandstone.