>Sauropods have never been found in any of the Late Cretaceous units of >the northwestern part of North America - hence, Albertosaurus, >Daspletosaurus, and Tyrannosaurus would likely never have seen a >sauropod. What about the Maastrichtion sauropods _Alamosaurus_ (North Horn Fm, Utah) and _Dyslocosaurus_ (Lance Fm, Wyoming)?