© Mapbox · © OpenStreetMap contributors · Boundary data © Cadw
Tyn y Coed Earthwork is an unclassified earthwork of unknown purpose located in Wales and protected by Cadw as a scheduled monument under reference GM024. The site sits upon Dinantian limestone bedrock, a foundation of Mississippian age comprising primarily limestone with subordinate sandstone and argillaceous rocks. This geological base would have influenced both the construction methods available to those who raised the earthwork and its subsequent preservation.
The earthwork's true function remains undetermined, reflecting the interpretative challenges posed by monuments that lack diagnostic features such as associated artefacts, structural remains, or clear morphological parallels. The landscape setting upon limestone geology is characteristic of upland or marginal terrain in Wales, where earthworks frequently served defensive, administrative or ceremonial purposes during the prehistoric and early medieval periods.
The monument's protected status recognises its archaeological significance despite the absence of firmly established dating or functional interpretation. Such unclassified earthworks form an important component of the Welsh archaeological record, representing landscape interventions whose original meaning has been obscured by time and erosion.
Tyn y Coed Earthwork is a scheduled monument protected by Cadw under reference GM024. View the official record →
Tyn y Coed Earthwork is an unclassified earthwork of unknown purpose located in Wales and protected by Cadw as a scheduled monument under reference GM024.
Tyn y Coed Earthwork dates from the unknown period, and is classified as a earthwork (unclassified). It is one of over 32,000 scheduled monuments protected across the UK.
Tyn y Coed Earthwork 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 GM024.
Several scheduled monuments lie within 10 km, including Middleton Moated Site (3.4 km), Round Barrow 612m N of Bendrick Rock (4.9 km), St Mary's Well Bay Pillbox (5.2 km).
This page is just one thread. A full Aubrey report pulls together 13 strands of Tyn y Coed Earthwork'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.
Tyn y Coed Earthwork stands on Dinantian Rocks (Undifferentiated), bedrock that formed in the Mississippian. The rock here is limestone with subordinate sandstone and argillaceous rocks.