{Newer. Still future (?) Age of + Modern {Middle. Historic. Man + {Older. Pre-historic. + + {N. Post-Glacial gravels and cave # + { deposits. Saxicava sand and # + Post- { terraces (America). # + Pliocene {M. Marine Clays. Leda clays. Erie # - + { clay (America). # - + {O. Glacial Drift. Boulder clay # - + { (America). # - + # - + {N. Norwich crag; Sicilian and # - { Val d'Arno beds. # - Pliocene {M. ____________ Sumter group (America). # - {O. Red and Coralline crag; Sub-appenine # - = { beds. # - = # - = {N. Faluns of Loraine; Upper Molasse; # - = { Siwalik beds; Oeningen plant beds. # - = { York-town beds (America). # - = Miocene {M. ____________ # - = {O. Upper Paris beds; Hempstead and Bovey # - = { beds; Lower Molasse. Nebraska beds # - = { (West America). # Mammals. - = # - = {N. Gypseous series, Paris. Vicksburg # - = { group (America). # = Eocene {M. Calcaire Grossier, Bagshot and Alum # = { Bay beds. Jackson group (America). = {O. Argile Plastique; London clay. = { Claiborne group (America). = CHAPTER XIII. CLOSE OF THE POST-PLIOCENE, AND ADVENT OF MAN. (_Continued._)