|Brockagh (Glendalough b) - Bullaun Stone||Brockagh (Glendalough c) - Bullaun Stone|
|Brockagh (Glendalough d) - Bullaun Stone||Brockagh (Glendalough e) - Bullaun Stone|
|Brockagh (Glendalough m) - Bullaun Stone|
This group of four bullaun stones is the real attraction in this field. Three of the stones have single bullauns and the fourth has four - making seven, hence the name.
The three single bullaun stones are all earthfast boulders that do not stand too proud of the ground. The 'main' stone is extremely unsual, because tree of its bullauns are in the bottom of a rectangular depresion. The fourth bullaun is just outside this oddity.
The weather was very nasty today, so I will have to come back to take some better images and to locate the other two stones that I didn't find.
A small, man made, hemi-spherical depression used as decoration on stones, usually no more than a few centimetres in diameter. They are quite often found with one or more rings around them.
Andy commented that you really need a step ladder for this group. It really is difficult to photograph them all together, so I think I may well head back here at some point and do just that.
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.