Gwynedd Archaeological Trust
Regional Historic Environment Record

Burial Chamber, Possible, Maen Chwyf

Primary Reference Number (PRN) : 2104
Trust : Gwynedd
Community : Rhosybol
Unitary authority : Ynys Mon
NGR : SH43268574
Site Type (preferred type first) : Neolithic CHAMBERED TOMB
Status : Scheduled Ancient Monument

Summary :
The mound known as Maen Chwyf burial chamber is situated on an outcrop. There appears to be a large capstone, 3.6m long by 2.7m wide, supported by several smaller stones partially standing in the gorse thicket surrounding the site.

Although the site is a scheduled ancient monument, the interpretation of it as a burial chamber has been questioned. What has been identified as the capstone and main supporting stones do not appear to be the right shape or proportions. It is now considered more likely that the mound is a natural feature.

Description :
Maen Chwyf. <1>

The position of two stones beneath the principal stone (12ft by 9ft) and the flat under-surface of the principal stone suggest that this is possibly a collapsed megalithic burial chamber. <2>

Maen Chwyf stands on an outcrop about 310 yards away from Llys Einion standing stone (2103). Other stones, some apparently set up, are round about. (RCAHMW, 1937)

Maen Chwyf consists of a large capstone some 4m long and 3m wide, supported approximately 1m above the ground by several small semi-recumbent orthostats. These stones, probably the remains of a burial chamber, are enclosed in a dense gorse thicket. <4>

Identification of this site as a burial chamber requires substantiation. <5>

Maen Chwyf (orthography). <6>

Maen Chwyf. Probably a natural feature, it being indistinguishable from neighbouring heaps of boulders. <7>

The site is as described by Davidson. This is probably a collapsed burial chamber, support stones being plainly visible at either end. Doubt may have arisen because the capstone is of unusual shape and is not flat-bottomed. Excavation would probably be necessary to determine absolutely that the site is an authentic burial chamber. <9>

See quote from Griffiths John E/1900/ The Cromlechs of Anglesey and Caernarfon on FMW 107 1992 SAM AN076 <11>

Main stone 4m x 2.20 x 1.40. Collapsed support? 2m x 1.40. The supposed support stone is of a rounded outline which makes it less likely that it was an orthostat. The supposed capstone is also immensely thick and somewhat bevelled underneath which would have made it difficult to support. (Smith, 2003)

Sources :
Cooke, N. , 2014 , Rhyd-y-Groes Repower, Anglesey: Cultural Heritage Assessment. ( © Wessex Archaeology)
Hadley, A. , 2016 , Proposed Wind Turbine at Nant-y-fran, Cemaes, Isles of Anglesey. Cultural Heritage Impact Assessment. ( © Archaeology Wales)
Smith, G. , 2003 , Prehistoric Funerary and Ritual Monument Survey: West Gwynedd and Anglesey ( © GAT)
Smith, G., and Steele, N. , 2005 , Pan-Wales Prehistoric Funerary and Ritual Sites Survey: Trial Data Synthesis ( © GAT)
The Royal Commission on the Ancient and Historical Monuments of Wales , 1937 , An Inventory of the Ancient Monuments in Anglesey
Ordnance Survey , 1963 , SH48NW , <1>
Neil Baynes, E. , 1910 , Transactions of the Honourable Society of Cymmrodorion , <2>
Ordnance Survey , 1970 , SH48SW 2 , <4>
Daniel, G. , 1950 , Prehistoric Chamber Tombs , <5>
, SH48NW , <6>
Powell, T. G. E. , 1969 , Megalithic Tombs in North Wales , <7>
Harkness, M. D. , 1987 , PRN 2104 , <9>
Griffiths, J. E. , 1900 , The Cromlechs of Anglesey and Caernarfon , <11>

Events :
42245 : An 076 Fmw Site Visit (year : 1986)
42246 : An 076 Fmw Site Visit (year : 1992)
42247 : Prn 2104 Gat Site Visit (year : 1987)
40526 : Prehistoric Funerary and Ritual Monument Survey: West Gwynedd/Anglesey (year : 2003)
45013 : Rhyd-y-Groes Repower, Anglesey: Cultural Heritage Assessment. (year : 2014)
40527 : Pan-wales Prehistoric Funerary and Ritual Sites Survey: Trial Data Synthesis (year : 2005)
45130 : Proposed Wind Turbine at Nant-y-fran, Cemaes, Isle of Anglesey. Cultural Heritage Impact Assessment. (year : 2016)

Related PRNs : 302473

Compiled date : 16-12-1986


Images :



The above data are supplied by GAT in partnership with its Local Authorities (Anglesey, Conwy and Gwynedd County Councils, and Snowdonia National Park Authority), © GAT 2018 (and in part © Crown, 2018 - as indicated)
This information is supplied for the purposes of personal interest only and may not be used as part of a commercial project.

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