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Paleogene
 

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Palaeogene




This period consists of the Paleocene , Eocene , and Oligocene Epochs. The Paleogene follows the Cretaceous Period and is followed by the Miocene Epoch of the Neogene Period. The terms 'Paleogene System' and 'Lower Tertiary System' have also been used to describe what is currently called the 'Paleogene Period'. The somewhat confusing terminology seems to be due to attempts to deal with the comparatively fine granularity of time units as time approaches the present and more information is preserved. By dividing the Tertiary Era into two 'Periods' instead of 7 'epochs', the periods are more closely comparable to the duration of 'periods' in the Mesozoic and Paleozoic Eras.