There is no earthwork to speak of, no raised bank or sunken ditch to catch the eye. The only evidence that something is there at all appeared briefly, in the summer of 1970, as a faint discolouration in a growing crop.

The enclosure was identified from an aerial photograph taken on 14 July 1970, where it showed up as a cropmark. Cropmarks form when buried features affect how plants grow above them: a filled-in ditch, or fosse, retains more moisture than the surrounding soil, causing the crop overhead to grow taller or stay greener longer, while a buried wall or compacted surface has the opposite effect. From the air, under the right conditions of drought and low sun angle, these differences become legible as rings, lines, or geometric shapes that would otherwise go completely unnoticed. In this case, the circular mark indicates the fosse of an enclosure, the kind of boundary ditch that in early medieval Ireland typically surrounded a farmstead or ringfort. A diameter of around 75 metres places it at the larger end of that tradition, suggesting it may have been a site of some local significance, though exactly what stood inside it, and when, remains unknown.

The field has been under tillage, which is precisely the land use that makes cropmark detection possible but also means the buried remains are subject to ongoing disturbance from ploughing. Nothing is visible on the surface today, and without excavation the enclosure exists only as a shape caught once, half a century ago, in a single aerial frame.