Presenting as a 'super-sized' ring-ditch, it has been proposed by Clwyd-Powys Archaeological Trust that this represents a 'formative henge': one of several recognised across Britain from cropmark evidence. Dating to the Middle Neolithic era, the ring-ditch measures c. 36m in diameter. It is suggested that a bank may have existed around the external perimeter of the monument. The exact nature of the monument, however, remains unclear.
Source: Clwyd-Powys Archaeological Trust Report No. 1122, December 2011 [RCAHMW CPAT16/07]
L. Moore, RCAHMW, 10th April 2012
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application/pdfCPAT - Clwyd-Powys Archaeological Trust ReportsClwyd-Powys Archaeological Trust Report on a 2011 Trial Excavation at 'Collfryn Ring-ditch, Guilsfield, Powys'. CPAT Report No. 1122: produced for Cadw. Paper and digital copy.
