Greenan : Wedge Tomb

Grid RefH 172 293
Longitude7° 44' 10.82" W
Latitude54° 12' 44.1" N
ITM east480366
ITM north584435
Nearest TownSwanlinbar (2.9 Km)
OS Sheets26, 27A
UTM zone29U
UTM x449041
UTM y5761192
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Visit Notes

Sunday, 5th May 2002

This is a very strange tomb indeed. It is a wedge tomb with an extension. It is aligned east/west with an uncovered portico at the west end and main chamber to the east which has two roof stones (one slipped and one in place).

To the south there are two additional chambers, presumably added later, that equal the main tomb in size. One of these chambers is full of cairn rubble. Some evidence of double walling exists down both sides. Separating the portico from the main chamber is a low sill stone, whereas the two subsidiary chambers are separated by a full height septal slab.

To the east, right on the edge of a steep drop there are some possible kerb stones set into a wall.

Strangely the portico (and therefore the entrance) faces into the hillside that rises steeply above the tomb. The location though is one that is definitely chosen for its views which look east towards Lough Erne.

Like this monument

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About Coordinates Displayed

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.

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