A life can be cretaceous.Logical formLearned from19 sentences. Fossils may date from a cretaceous period.Logical formLearned from19 sentences. A world can be cretaceous.Logical formLearned from19 sentences. Ammonites can be cretaceous.Logical formLearned from17 sentences. A rock can be cretaceous.Logical formLearned from17 sentences. An age may pertain-to a cretaceous period.Logical formLearned from16 sentences. Eras can be cretaceous.Logical formLearned from15 sentences. A close may pertain-to a cretaceous period.Logical formLearned from15 sentences. A part may pertain-to a cretaceous period.Logical formLearned from15 sentences. A bedrock can be cretaceous.Logical formLearned from14 sentences. Mammals can be cretaceous.Logical formLearned from14 sentences. A geologic period can be cretaceous.Logical formLearned from14 sentences. Rocks can be constituted-of-or-filled-with cretaceous age.Logical formLearned from13 sentences. A geologic formation can be cretaceous.Logical formLearned from12 sentences. An age can be cretaceous.Logical formLearned from12 sentences.