Pliocene

The Pliocene ( /ˈplaɪ.əsiːn/; archaically Pleiocene) Epoch (symbol PO) is the period in the geologic timescale that extends from 5.332 million to 2.588 million years before present. It is the second and youngest epoch of the Neogene Period in the Cenozoic Era. The Pliocene follows the Miocene Epoch and is followed by the Pleistocene Epoch. Prior to the 2009 revision of the geologic time scale, which placed the 4 most recent major glaciations entirely within the Pleistocene, the Pliocene also comprised the Gelasian stage, which lasted from 2.588 to 1.805 million years ago.

As with other older geologic periods, the geological strata that define the start and end are well identified but the exact dates of the start and end of the epoch are slightly uncertain. The boundaries defining the onset of the Pliocene are not set at an easily identified worldwide event but rather at regional boundaries between the warmer Miocene and the relatively cooler Pleistocene. The upper boundary was set at the start of the Pleistocene glaciations.

Read more about PlioceneOrigin of Name, Subdivisions, Climate, Paleogeography, Flora, Fauna, Oceans, Supernovae

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