It belongs to a category of site known as a cropmark enclosure, where the buried remains of a ditch or bank cause the crops growing above them to ripen at a slightly different rate or colour than the surrounding plants, revealing the outline of a structure that might otherwise go unnoticed for centuries more. This particular circle was identified and reported by Jean-Charles Caillère, who spotted it on satellite imagery.

Circular enclosures of this kind are a familiar, if still incompletely understood, feature of the Irish landscape. Many are the remains of ringforts, the enclosed farmsteads built predominantly between the early medieval period and the Norman arrival, though some may be earlier in origin, and others may have served different purposes entirely. Without excavation it is rarely possible to say which. What is clear here is that a modern field boundary running roughly northwest to southeast cuts through the approximate centre of the circle, and the enclosure is noticeably less legible in the field to the south of that boundary, where a different crop is growing and the visual contrast that makes cropmarks readable is simply absent. The site sits in tillage ground, continuing to be farmed as it presumably has been for generations, its circular form pressing quietly through from below.