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Trail of ankilosaur footprints. This track is right at the entrance of the town of Torotoro.
The distinctive linear patterns observed on the surface of this sandstone bed are trace fossils produced by crustaceans as they were moving in the originally loose sediment. The technical term for this type of biogenic structures is bioturbation. Photo taken on a sandstone slab at the Varvito Park, Ito, Brazil, with exposures of Permian strata from the Itararé Group.
Walking on mudcracks. A dinosaur left this track in muddy sediment that shrank, forming polygons upon desiccation. Trackway exposed in Cretaceous layers from the Sousa Basin of Brazil, at the Vales Dos Dinossauros geosite.