《JWA》黑鱷頭目 Imperatosuchus。30綠豪x2+30黑雙+26死暴，7回合

These tracks from Dinosaur Ridge National Monument are a very special kind of fossil called ichnofossils. Ichnofossils fossils or trace fossils are biologically produced sedimentary structures that include tracks, trails, burrows, borings, fecal pellets, and other traces made by organisms. Dinosaur Ridgebis ine of the most propific track sites in the U.S. with impressions from Iguanodon-like herbivores, large and small therapods, Ornithomimids, and crocodiles. #paleontology #fossils #findingfoss