Magazine covering boulders.
Rolling stones (also called sliding rocks, walking rocks, sailing stones, and hey look those rocks done moved) are a band of rocks. They move and inscribe long tracks along a smooth valley floor without animal intervention. These tracks are then recorded and released and rated on Billboard.
The movement of the rocks occurs when large sheets of ice a few millimeters thick and floating in an ephemeral winter pond break up on sunny days. Either than or the rocks are moved as by Eris.
Trails of sliding rocks have been observed and studied in various locations, including major rock venues.