Neogene vertebrate palaeoichna+C1575logy of the North Atlantic coast of the Rio Negro Province, Argentina

摘要: Tetrapod footprints assigned to mammals and birds were discovered at continental deposits from the Atlantic coast of Rio Negro Province, Argentina. The study took place along 30km a marine beach area between Balneario El Condor La Loberia (41oS, 62o30'-64o30'W); in region, abrasion platforms crop out as remnants eroded high cliffs. stratigraphic sequence begins with base profile, followed by sediments beds cropping on cliff wall; thus range ichnofauna extends late Miocene (imprints platforms) early Pliocene (footprints fallen rocks, lying cliffs). are tardigrad xenarthrans (Megatherichnum oportoi cf. Mylodontidichnum isp.); ungulates indet. A trackway carnivorous marsupial isolated hydrochoerid rodent also occur, well trace fossils phorusrhacids flamingos, among others. is registered interdune pool ephemerous lagoon sediments, such it indicated lacustrine desiccation mud-cracks.