The enclosure, defined by a fosse (a type of boundary ditch), only reveals itself as a cropmark, a phenomenon that occurs when buried earthworks alter how moisture and nutrients reach the plants above, causing subtle differences in colour and growth rate that become apparent in aerial or satellite photography. This one came to light through satellite imagery, the kind now available to anyone with a smartphone.

The enclosure sits immediately north of a separate oval enclosure, which was identified and reported by Jean-Charles Caillère. The relationship between the two features is not yet resolved. The curvilinear enclosure may be physically joined to its neighbour, suggesting they functioned together as part of a single site, or it could belong to an earlier phase of activity altogether, with the oval enclosure built later and independently nearby. Such enclosed sites in the Irish landscape are often associated with early medieval settlement, though without excavation it is difficult to assign a firm date or purpose to either feature here.