Sitting on top of a small mound by a farm track is a huge boulder, sitting on top of several smaller stones. As soon as I saw it I thought it had to be a boulder burial , but the map showed nothing. Later after looking at the OS map again I saw that there is a red dot, but no label.
The boulder is quite massive, about 1.8m in all directions.
Boulder burials are very simple, yet striking monuments. As the name suggest they are simply burials beneath a large boulder. The burials contained within are mainly single and set in a small kist like chamber made from smaller stones (see Reanacaheragh (County Cork).
Boulder burials can be found on their own or within or around stone circles. The boulders often bear cup marks and were often picked for their curiously attractive shape or rock patterns.
This is an explanation of (and a bit of a disclaimer for) the coordinates I provide.
Where a GPS figure is given this is the master for all other coordinates. According to my Garmin these are quite accurate.
Where there is no GPS figure the 6 figure grid reference is master for the others. This may not be very accurate as it could have come from the OS maps and could have been read by eye. Consequently, all other cordinates are going to have inaccuracies.
The calculation of Longitude and Latitude uses an algorithm that is not 100% accurate. The long/lat figures are used as a basis for calculating the UTM & ITM coordinates. Consequently, UTM & ITM coordinates are slightly out.
UTM is a global coordinate system - Universal Transverse Mercator - that is at the core of the GPS system.
ITM is the new coordinate system - Irish Transverse Mercator - that is more accurate and more GPS friendly than the Irish Grid Reference system. This will be used on the next generation of Irish OS maps.