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Latitude: 51.675 / 51°40'30"N
Longitude: -3.7463 / 3°44'46"W
OS Eastings: 279345
OS Northings: 198805
OS Grid: SS793988
Mapcode National: GBR H5.5NDM
Mapcode Global: VH5GP.05T8
Entry Name: Blaen-Cwmbach Earthwork
Scheduled Date:
Source: Cadw
Source ID: 394
Cadw Legacy ID: GM277
Schedule Class: Monument
Category: Enclosure
Period: Prehistoric
County: Neath Port Talbot (Castell-nedd Port Talbot)
Community: Tonna
Traditional County: Glamorgan
The monument is a small earthwork situated near the north-west corner of the Roman marching camp (GM258) on the ridge east of Tonna, Neath. It comprises an earth and stone bank about 9m wide and 1.5m high with a ditch on the south east side forming in plan the quadrant of a circle about 50m radius. There is a gap about 7.5m wide with a corresponding causeway across the ditch about 30m from the north end. The monument is probably an unfinished or slighted enclosure dating to the Iron Age (800BC to 43AD).
The monument is of national importance for its potential to enhance our knowledge of later prehistoric defensive organisation and settlement. The site forms an important element within the wider later prehistoric context and within the surrounding landscape. Its significance is further enhanced by its location within the later Roman encampment.
Source: Cadw
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