Pliocene

The Pliocene epoch (a.k.a. formerly Pleiocene) is the period in the geologic timescale that extends from 5.3 million to 1.8 million years before present.

Pliocene oceans

Oceans continued to be relatively warm during the Pliocene, though continued cooling. The Arctic ice cap formed, drying the climate and increasing cool shallow currents in the North Atlantic. Deep cold currents flowed from the Antarctic.

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The Pliocene seas were alive with sea cows, seals and sea lions.

Related Topics:
Sea cow - Seal - Sea lion

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