encroachment of peat. Function See also List of archaeological sites in County Tyrone References Sources McNally, Kenneth (2006). "Ireland's Ancient Stones" (Belfast: Appletree Press). External links Beaghmore Stone Circles - Cookstown - Discover Northern Ireland Beaghmore Stone Circle – The Modern Antiquarian Beaghmore Circles and Alignments – Megalithic Ireland Beaghmore – Irish Megaliths Beaghmore Stone Circles – Tourism Information Archaeological sites in County Tyrone Prehistoric sites in Northern Ireland Stone circles in Northern Ireland Scheduled monuments in Northern Ireland