Footprints can be cretaceous.Logical formLearned from2 sentences. A stratum may pertain-to a cretaceous period.Logical formLearned from2 sentences. Organisms can be cretaceous.Logical formLearned from2 sentences. A line can be between cretaceous periods.Logical formLearned from2 sentences. Dinosaurs may pertain-to a cretaceous period.Logical formLearned from2 sentences. Gastropods can be cretaceous.Logical formLearned from2 sentences. A (limestone succession) can be cretaceous.Logical formLearned from2 sentences. A (fossil record) can be cretaceous.Logical formLearned from2 sentences. Cretaceous periods can be in an area.Logical formLearned from2 sentences. (Dinosaur communities) can be cretaceous.Logical formLearned from2 sentences. A living can be cretaceous.Logical formLearned from2 sentences. A community can be cretaceous.Logical formLearned from2 sentences. An iguanodontian may live during a cretaceous period.Logical formLearned from2 sentences. An (age agaricomycete) can be cretaceous.Logical formLearned from2 sentences. Vertebrates can be cretaceous.Logical formLearned from2 sentences.