A rock-cut basin is a natural cylindrical depression cut into stream or river beds, often filled with water. Such plucked-bedrock pits are created by kolks; powerful vortices within the water currents which spin small boulders around, eroding out these rock basins by their abrasive action. These basins are frequently found in streams and rivers with a relatively soft rock substrates such as limestones and sandstones. The rather unusual and man-made appearance of such depressions has led to various folk-tales becoming associated with them, such as their identification as petrosomatoglyphs, including knee prints, elbow prints, etc. of saints, heroes, kings or supernatural beings.[1]
- ^ Pennick, Nigel (1996). Celtic Sacred Landscapes. Thames & Hudson. ISBN 0-500-01666-6. P. 40.