AGE OF MAN, or REPTILIAN AGE. MAMMALIAN AGE. Triassic, 16. Jurassic, 17. Cretaceous, 18. Quaternary, 20. Tertiary, 19. Wealden Ep. Oölytic Epoch Epochs. Liassic Epoch Pliocene. Miocene. Eocene. (Uppor or White Upper Cretaceous. Chalk (. Lower or Gray. .Middle Cretaceous (Upper Green-sand). Lower Cretaceous. (Lower Green-sand. Wealden. (Purbeck, Portland, and Upper Oölyte. (Kimmeridge Clay. Middle Oölyte. (Oxfordflay. Lower Oölyte. Inferior Oölyte. Upper Lias. Marlstone. Lower Lias. Keuper. Musc…