Arundel Formation

Dinosaurs present include the large theropod Acrocanthosaurus, and "Coelurus" gracilis, the ornithomimosaurian "Dryosaurus" grandis, as well as another indeterminate ornithomimosaurian (though it most likely is Nedcolbertia), the nodosaurid Priconodon, a possible basal ceratopsian, and potentially the ornithopod Tenontosaurus. at least three genera of turtles, and several crocodilians. In contrast, among other vertebrate taxa, there are major differences between the Arundel and these western formations; in the Arundel, crocodylomorph and shark remains are far more common than those of bony fishes, whereas the opposite is true for the western formations. This may owe to differing environmental conditions on the Atlantic coast compared to the North American interior. Turtles Crocodylomorphs Mammals ==Other fossils==

William Bullock Clark (1897) described lignitized trunks of trees often found in upright positions with their roots still intact. ==See also==