The flattened stone surface bears between 25 and 30 cupmarks; shallow, circular depressions carved into the rock face by human hands centuries ago. The largest of these mysterious markings measures 10 centimetres across and 3 centimetres deep, whilst a second prominent cupmark spans 7 centimetres in diameter and reaches 2 centimetres in depth. The remaining marks are considerably smaller, creating a constellation of ancient indentations across the weathered stone.

Local tradition has woven these prehistoric carvings into the tapestry of Christian folklore, claiming them to be the knee prints of St. Columcille himself. This saint, also known as Columba, was one of Ireland's most influential early Christian figures, founding the monastery at Iona and numerous churches across Ireland and Scotland in the 6th century. The association of these cupmarks with the saint reflects a common pattern in Irish archaeology, where ancient sites were often reinterpreted through a Christian lens as the new faith spread across the island.

Cupmarks like these are found throughout Ireland, Scotland, and other parts of Atlantic Europe, typically dating from the Neolithic to the Bronze Age periods. Their original purpose remains one of archaeology's enduring mysteries; theories range from astronomical markers to ritual sites, though their true meaning has been lost to time. What makes this particular example noteworthy is not just the physical evidence of our ancestors' handiwork, but the layers of meaning that subsequent generations have added, transforming prehistoric art into a tangible connection to one of Ireland's most beloved saints.