The rock is easy to miss: roughly triangular, about a metre and a half across, flush with the ground in a poorly drained cutaway bog, its surface so weathered that large sections of stone have spalled away, taking much of the original carving with them. What survives does so only faintly, the ancient pocking worn to near-invisibility in places.

The carvings belong to a tradition of prehistoric rock art found widely across Ireland and Atlantic Europe, typically dated to the Neolithic or early Bronze Age, though the precise meaning of the motifs remains genuinely unknown. The most legible design at Kealduff is a cup-and-double-ring, a form in which a small central hollow, here about five centimetres across, is surrounded by two concentric rings. Cup marks are exactly what they sound like, small bowl-shaped depressions pecked into rock surfaces, and they appear both alone and in combination with encircling grooves throughout the Irish tradition. What makes this particular example unusual is the geometry of its outer ring, which is not smoothly circular but angular, forming something close to a pentagon. From the south side of this motif, a radial groove extends and then bends clockwise, tracing an irregular curved line roughly 1.2 metres long before looping back to rejoin the composition at its northern edge. East of this main motif sits a second sub-circular ring, itself irregular in shape, enclosing at least three further cup marks and a groove. The rest of the carved surface has deteriorated too far to read clearly, leaving only scattered cups of varying sizes and faint groove lines. Aoibheann Lambe identified and recorded the panel in detail in October 2022.