Stone rows, a form of megalithic monument consisting of two or more upright stones set in a line, are found in some number across the Cork and Kerry uplands, though their original purpose remains a matter of ongoing debate among archaeologists. This one stretches just 3.8 metres in a northeast to southwest orientation, its three stones unequal in height and condition: the northeast stone stands at around three-quarters of a metre, the southwest stone slightly taller at nearly a metre, and the middle stone has fallen and lies partly buried, its full dimensions obscured by the ground.

The arrangement was noted by Conlon in 1918, catalogued as entry 226 in his survey, and has since been incorporated into the broader archaeological record for the region. What makes the Carrigonirtane site particularly interesting is its immediate context. Within 250 metres to the east stand two further prehistoric monuments: a five-stone circle and a separate four-stone row. Five-stone circles are a type of small stone circle characteristic of the Cork and Kerry region, typically comprising four upright stones with a larger recumbent stone laid flat between two of them. That three distinct megalithic features occupy such a compact area suggests the landscape here held some sustained significance during prehistory, possibly over several generations or periods of use. A ringfort, the remains of an early medieval circular enclosed settlement, lies a short distance to the northwest, adding a later layer of human activity to the same ground.