The rock is earthfast, meaning it is fixed in the ground rather than a loose or transported boulder, and its surface carries a series of motifs that belong to a tradition of prehistoric mark-making found widely across Atlantic Europe. What makes this example quietly compelling is the specificity of its design: three cup-and-ring motifs conjoined together, with areas of deliberate pocking worked into the spaces between the central cups and their surrounding rings.

Cup-and-ring marks are among the more enigmatic survivals of prehistoric activity in Ireland. The basic form, a small circular depression, the cup, enclosed by one or more concentric carved rings, appears on rocks and boulders from Kerry to Donegal, and across Scotland and northern England. Their purpose remains genuinely unclear; interpretations have ranged from territorial markers to ritual or astronomical significance, though none has been conclusively established. At Kealduff, the three motifs are not simply placed side by side but are conjoined, sharing elements of their form, which gives the composition a considered, deliberate quality. The pocking between cup and ring adds further texture, suggesting the carver was working with a clear visual intention rather than simply repeating a standard template. The site was identified and described by Aoibheann Lambe, whose documentation brought it to wider attention in 2022.