(Fossil bird) may pertain-to a cretaceous period.Logical formLearned from1 sentences. (Fossil bird) of a cretaceous period may be considered.Logical formLearned from1 sentences. A period can be to a cretaceous period.Logical formLearned from1 sentences. (Fossil bird) of a period to a cretaceous period may be considered.Logical formLearned from1 sentences. A cretaceous sea may penetrate an area.Logical formLearned from1 sentences. Outbursts may commence in a cretaceous period.Logical formLearned from1 sentences. Remains of cretaceous age can be noteworthy for a distribution.Logical formLearned from1 sentences. Masses can be constituted-of-or-filled-with cretaceous limestone.Logical formLearned from1 sentences. A members may pertain-to a cretaceous system.Logical formLearned from1 sentences. A female may pertain-to a cretaceous period.Logical formLearned from1 sentences. A female of a cretaceous period may be quarried.Logical formLearned from1 sentences. A horizon can be cretaceous.Logical formLearned from1 sentences. Affinities can be cretaceous.Logical formLearned from1 sentences. A close of a cretaceous period may be marked by an emergence of a land.Logical formLearned from1 sentences. Beds may pertain-to a cretaceous system.Logical formLearned from1 sentences.