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Friday, April 13, 2012

Geological Eras

Era:                     Years after 1950(?) it began:

Cenozoic                 65,000,000 years ago

Mesozoic                250,000,000

Paleozoic                540,000,000

Neoprotozoic          900,000,000

Mesoprotozoic      1,000,000,000     

Paleoprotozoic      2,500,000,000

Archaean              3,880,000,000

Hadean                 4,500,000,000

Each of these Eras may be divided into Periods. Cenozoic may be too young to have Periods.

I am pretty sure that most of these Eras belong to the Phanerozoic Eon.

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