Aughnagurgan : Portal Tomb

CountyMonaghan
Grid RefH 871 286
Longitude6° 39' 54.82" W
Latitude54° 11' 55.88" N
ITM east480366
ITM north584435
Nearest TownNewtownhamilton (6 Km)
OS Sheets28, 28B
UTM zone29U
UTM x449041
UTM y5761192
Hide map  (N.B. Google Maps & GPS readings are slightly out of sync - position is approximate)
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Visit Notes

Sunday, 16th June 2002

Just beyond the remains of the passage tomb, in the second field from the road and visible from the gate is this curious portal tomb.

It is very obviously a portal from the size of the capstone (which has a wonderful shape) but as for the other stones it is very difficult to discern their original role in the structure.

One portal stone seems to be present, but recumbent and the wall slabs are fairly mixed up.The chamber would have been maybe 2m x 1.5m with the 3.5m long capstone resting on top.

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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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