Kilrooskagh : Portal Tomb

Grid RefH 061 400
GPSH 06139 39974 (8m)
Longitude7° 54' 20.43" W
Latitude54° 18' 30.25" N
ITM east480366
ITM north584435
Nearest TownGarrison (17 Km)
OS Sheet17
UTM zone29U
UTM x449041
UTM y5761192
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Visit Notes

Monday, 9th April 2007

How huge and wonderful would this monument have been? The capstone , which now has one side resting on the floor, is massive. It is held aloft on the other side by two equally large slabs set, rather confusingly, in a T formation. These are presumably the two side stones of the chamber , with one of them displaced.

The capstone is easily 3m long by 2m wide. It looks as though it's been shaped as it s very symmetrical. I would say that the capstone still has its original alignment, i.e. east-west and the supporting stone that forms the cross piece of the T is the one that has been moved.

There is one other stone lying under the rear of the capstone that was probably the back stone of the chamber.

Unfortunately, a wall to the south of the tomb blocks the wonderful views in that direction that look over Lough Macnean Upper.

The large rock used to form the roof of a portal tomb or kist.

A compartment in a tomb in which burials were placed. In court tombs and wedge tombs a chamber is a sub-division of the burial gallery. Portal tombs have single chambers and passage tombs can have anything from one to five chambers, although usually passage tombs are considered to have a main chamber with extra subsidary chambers.

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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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