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Cof Cymru: National Historic Assets of Wales · Wales

Garn Las Earthwork

Aberdare West, Rhondda Cynon Taff, Wales

A scheduled monument in Aberdare West, Rhondda Cynon Taff, recorded as Round Cairn (Prehistoric).

Ordnance Survey six-inch map, 2nd edition (1888–1913) covering the location of Garn Las Earthwork, Aberdare West, Rhondda Cynon Taff, with a pin at the register's coordinates
Ordnance Survey six-inch map, 2nd edition (1888–1913), covering this location. Courtesy of the National Library of Scotland. The pin is ours, placed from the register's coordinates.

The record

Designation
Scheduled monument
Site type
Round Cairn
Period
Prehistoric
Community
Aberdare West
Unitary authority
Rhondda Cynon Taff
Country
Wales
Coordinates (centre of the scheduled area)
51.72484, -3.40728
SAM number
GM236
Cadw record number
2884

Slide toward Today to fade the historical sheet and see the modern map underneath.

David Rumsey Map Collection, Stanford Libraries

5 historical maps cover this location, the earliest the 1636 map "Cornubia : Devonia, Somersetus, Dorcestria, Wiltonia, Glocestria ..." (David Rumsey Map Collection, Stanford Libraries).

Historical maps covering this location

  • 1636 · Cornubia : Devonia, Somersetus, Dorcestria, Wiltonia, Glocestria ... (David Rumsey Map Collection, Stanford Libraries)
  • 1637 · The fourth table of England. Cornub. Devonia, Somerset etc. (David Rumsey Map Collection, Stanford Libraries)
  • 1865 · England and Wales. England No. 6. (David Rumsey Map Collection, Stanford Libraries)
  • 1895 · Sheet 11. Ordnance Survey of England and Wales. (David Rumsey Map Collection, Stanford Libraries)
  • 1898 · 231 Merthyr Tydfil (Hills) (David Rumsey Map Collection, Stanford Libraries)

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This record in Cadw's own full report ↗

Cadw's description

The monument comprises the remains a burial cairn, probably dating to the Bronze Age (c. 2300 - 800 BC).

This circular cairn measures 14m in diameter by c. 1.5m in height. The stones are heaped in an irregular mound and there are signs of disturbance on the west side which has a semi-circular section cut out of it. There are also two hollows c. 1m deep on the inside. On the outside a low bank survives to a height of 0.5m.

The monument is of national importance for its potential to enhance our knowledge of prehistoric burial and ritual practices. The monument is an important relic of a prehistoric funerary and ritual landscape and retains significant archaeological potential, with a strong probability of the presence of both intact burial or ritual deposits, together with environmental and structural evidence. Cairns may be part of a larger cluster of monuments and their importance can further enhanced by their group value.

The scheduled area comprises the remains described and areas around them within which related evidence may be expected to survive.

Nearby in the register

Other entries of the same register within about three miles of this one, by straight line.

Designated Historic Asset GIS Data, The Welsh Historic Environment Service (Cadw), 2026-09-07, licensed under the Open Government Licence http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/ Cadw, the Welsh Historic Environment Service · Open Government Licence v3.0
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