15. Paleocene
    The Paleocene epoch is the first geologic epoch of the Palaeogene period in the modern Cenozoic era
    http: //academickids.com/encyclopedia/index.php/Pal...
    
    
16. Pleistocene
    The Pleistocene Epoch is part of the geologic timescale
    http: //academickids.com/encyclopedia/index.php/Ple...
    
    
17. Pliocene
    The Pliocene epoch is the period in the geologic timescale that extends from 5.3 million to 1.8 million years before present
    http: //academickids.com/encyclopedia/index.php/Pli...
    
    

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