👉 Thrushings, also known as thurshings or thurshards, are a type of archaeological artifact that consists of a series of narrow, circular depressions cut into the surface of a rock. They were often used by early humans to mark the boundaries of their territories and to provide a visual aid for navigation in the landscape. Thrushings can be found on a variety of rocks, including granite, quartzite, marble, and limestone, as well as on various types of soil