Hadrosaurus is an extinct genus of duck-billed dinosaur that lived during the Late Cretaceous period in what is now North America. It is the first dinosaur to be formally named and described in North America, and one of the best-known hadrosaurids. Had
From Wikipedia
Hadrosaurus is a genus of hadrosaurid ornithopod dinosaurs that lived in North America during the Late Cretaceous Period in what is now the Woodbury Formation in New Jersey about 83.6 to 77.9 million years ago. The holotype specimen was found in fluvial marine sedimentation, meaning that the corpse of the animal was transported by a river and washed out to sea. Some fossils are found in the Tar Heel/Coachman Formation.