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The Eras of Geological Time

 

        Pre-Cambrian Era

o       Archean Eon (4600 mya)

o       Proterozoic Eon (2500 mya)

        Paleozoic Era

o       Cambrian Period (590 mya)

o       Ordovician Period (505 mya)

o       Silurian Period (438 mya)

o       Devonian Period (408 mya)

o       Carboniferous Period

         Mississipian Epoch (360 mya)

         Pennsylvanian Epoch (320 mya)

o       Permian Period (286 mya)

        Mesozoic Era

o       Triassic Period (248 mya)

o       Jurassic Period (213 mya)

o       Cretaceous Period (144 mya)

        Cenozoic Era

o       Tertiary Period

         Paleocene Epoch (65 mya)

         Eocene Epoch (55 mya)

         Oligocene Epoch (38 mya)

         Miocene Epoch (25 mya)

         Pliocene Epoch (5 mya)

o       Quaternary Period

         Pleistocene Epoch (2 mya)

         Holocene Epoch (0.01 mya)

 

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