Sign of Ancient Times

Sign of Ancient Times. . One day, about 105 million years ago, a small herd of four-footed, plant-eating dinosaurs fled southward along an ancient shoreline. Their mortal enemy, a two-footed, meat-eating dinosaur, pursued close on their heels. The evidence of their passage was buried and turned to stone., Today the rock lies exposed here in the bed of the Paluxy River at Dinosaur Valley State Park. When the river is full and muddy after a rain, replicas of the tracks may be seen at the headquarters exhibit., Captions , Center: , 1) Pleurocoelus, a plant-eating, "lizard-hipped" dinosaur, 40 feet long , 2) Acrocanthosaurus, a meat-eating, "lizard-hipped" dinosaur, 25 feet long , 3) Tenontosaurussa, plant-eating, "bird-hipped" dinosaur, 15 feet long , 4) Iguanodon, a plant-eating, "bird-hipped" dinosaur, 30 feet long , 5) Pappotberium, the first known placental mammal , 6) Holoclemensia, the first known marsupial mammal , 7) Naomichelys, a swamp turtle , 8) Goniopholis (Dakotasuchus), an early crocodilian , 9) Theriosuchus, an early crocodilian , 10) an early Cretaceous pterosaur or flying reptile (unnamed), Upper Right: These tracks were made by an animal called Pleurocoelus, a type of sauropod related to brontosaurs. It had big, flat hindfeet with four claws, and small, hoof-like forefeet without claws., Lower Right: This track was made by a two-footed animal called Acrocanthosaurus, a type of carnosaur related to tyrannosaurs. Its feet had three clawed toes.