👉 The term "handstone" is a geological term that refers to a layer of sand or gravel that forms on the surface of a river bed, usually in shallow water and typically occurs after the river has been flowing for several years. Handstones are often found in rivers that have experienced heavy flows or have had periods of high sedimentation. They may be composed of various materials such as silt, clay, and sandstone, and they can vary in size from small boulders to large blocks
