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Dyke 387m E of Clawdd Trawscae Farm is an early medieval earthwork located in Wales and protected by Cadw (reference GM261). The monument comprises a linear defensive or boundary dyke typical of the early medieval period, when such works served to demarcate territorial divisions or provide fortified barriers across the landscape. The dyke's construction would have exploited the local topography and available materials to create an effective obstacle, taking advantage of the undulating terrain characteristic of its setting.
The monument sits upon bedrock of the South Wales Upper Coal Measures Formation, a geological sequence laid down during the Westphalian period and comprising mudstone, siltstone, sandstone, coal, ironstone and ferricrete. These varied strata would have provided both practical constraints and opportunities for the dyke's builders, with the harder bands of sandstone and ironstone potentially creating natural outcrops that aided construction, whilst the softer mudstones would have been more readily worked to raise the earthwork.
Early medieval dykes of this type played a significant role in the political and military landscape of Wales, often marking the boundaries between competing Welsh kingdoms or defending against external incursion. The survival of this monument provides valuable evidence of territorial organisation and settlement patterns during a formative period in Welsh history.
Dyke 387m E of Clawdd Trawscae Farm is a scheduled monument protected by Cadw under reference GM261. View the official record →
Dyke 387m E of Clawdd Trawscae Farm is an early medieval earthwork located in Wales and protected by Cadw (reference GM261).
Dyke 387m E of Clawdd Trawscae Farm dates from the early medieval period, and is classified as a dyke. It is one of over 32,000 scheduled monuments protected across the UK.
Dyke 387m E of Clawdd Trawscae Farm 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 GM261.
Several scheduled monuments lie within 10 km, including Cairnfield on Mynydd Eglwysilan (8 km), Prehistoric Rock Art on Mynydd Eglwysilan Common (8.1 km), Carneddi Llwydion (8.4 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Dyke 387m E of Clawdd Trawscae Farm'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.
Dyke 387m E of Clawdd Trawscae Farm 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.