XXI. PALEOCENE EPOCH, 65 mya - 54 mya

XXII. EOCENE EPOCH, 54 mya - 38 mya

XXIII. OLIGOCENE EPOCH, 38 mya - 23 mya

XXIV. MIOCENE EPOCH, 23 mya - 5 mya

XXV. PLIOCENE EPOCH, 5 mya - 1.8 mya

XXVI. PLEISTOCENE EPOCH, 1.8 mya - 12 tya

XXVII. HOLOCENE EPOCH, 12 tya - now

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  Victorian letters by Harlan Wallach © 1994

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