Ancient Monuments

History on the Ground

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Cefn Man Moel cross-ridge dyke

A Scheduled Monument in Argoed, Caerphilly (Caerffili)

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Latitude: 51.7442 / 51°44'39"N

Longitude: -3.2019 / 3°12'6"W

OS Eastings: 317117

OS Northings: 205740

OS Grid: SO171057

Mapcode National: GBR HX.17BJ

Mapcode Global: VH6D1.GF57

Entry Name: Cefn Man Moel cross-ridge dyke

Scheduled Date: 5 March 2008

Source: Cadw

Source ID: 1117

Cadw Legacy ID: MM345

Schedule Class: Defence

Category: Cross Ridge Dyke

Period: Unknown

County: Caerphilly (Caerffili)

Community: Argoed

Traditional County: Monmouthshire


The monument comprises a linear cross-ridge dyke running across the Cefn Man Moel ridge. The earthen bank is aligned from NE to SW and measures about 270m in length by about 5m in thickness and up to 0.7m in height; the associated ditch is situated immediately to the NW and measures about 2.5m in width and about 0.6m in depth. There is intermittent evidence of a low counterscarp bank. The tradition of cross-dyke building appears to roughly span two millennia, beginning in the middle Bronze Age and lasting throughout the Iron Age and into the early medieval period. They have been interpreted as territorial boundaries, defining areas of political influence and ritual association, including internal territorial boundaries and land allotment within communities.

The monument is of national importance for its potential to enhance our knowledge of prehistoric or early medieval land division. The monument is an important relic of a prehistoric or early medieval landscape and retains significant archaeological potential, with a strong probability of the presence of environmental and structural evidence.

The area scheduled comprises the remains described and an area around them within which related evidence may be expected to survive. It measures about 270m in length from NE to SW and 12m in width.

Source: Cadw

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