Caves, Treanfohanaun, Co. Mayo
Co. Mayo |
Settlement Sites
On the 1838 Ordnance Survey six-inch map, a feature at Treanfohanaun in County Mayo is labelled simply 'Caves'.
It is not caves in any natural geological sense but a souterrain, an underground passage or chamber constructed from stone, typically during the early medieval period in Ireland, and used variously for storage, refuge, or ventilation of a nearby settlement. The label is the kind of cartographic shorthand that quietly buries the real archaeology beneath a more dramatic-sounding word.
The souterrain sits, or sat, within a rath, a circular enclosure of earthen banks that would once have defined a farmstead. The rath itself has since been levelled, though its outline can still be traced in the landscape. The souterrain was located in the north-western quadrant of that enclosure. What remains visible today is suggestive rather than definitive: a slight circular depression, roughly five metres across, in the southern half of the site, which may indicate a further souterrain or a collapsed section of one beneath the surface. More tangible is a large stone slab lying among accumulated field clearance material at the roots of an ash tree on the south-western perimeter. It has been identified as a possible displaced roof lintel, the kind of substantial flat stone used to cap the roofed passages of a souterrain, likely shifted from its original position over generations of agricultural clearance. The combination of the old map record, the surface depression, and that dislodged slab together sketch the outline of something that was once genuinely subterranean, even if the word 'caves' overstates it by some distance.