An end may pertain-to a cretaceous period.Logical formLearned from285 sentences. Rocks can be cretaceous.Logical formLearned from227 sentences. A formation can be cretaceous.Logical formLearned from149 sentences. Sediments can be cretaceous.Logical formLearned from118 sentences. Fossils can be cretaceous.Logical formLearned from96 sentences. Deposits can be cretaceous.Logical formLearned from87 sentences. An era can be cretaceous.Logical formLearned from85 sentences. Strata can be cretaceous.Logical formLearned from77 sentences. An epoch can be cretaceous.Logical formLearned from53 sentences. Times can be cretaceous.Logical formLearned from53 sentences. A chalk can be cretaceous.Logical formLearned from53 sentences. (Rock formations) can be cretaceous.Logical formLearned from47 sentences. Beds can be cretaceous.Logical formLearned from46 sentences. Formations can be cretaceous.Logical formLearned from43 sentences. Dinosaurs can be cretaceous.Logical formLearned from38 sentences.