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Miocene
(redirected from 13 million years ago)

   Also found in: Dictionary/thesaurus, Wikipedia 0.02 sec.
Miocene
of, denoting, or formed in the fourth epoch of the Tertiary period, between the Oligocene and Pliocene epochs, which lasted for 19 million years

Miocene [′mīยทə‚sēn]
(geology)
A geologic epoch of the Tertiary period, extending from the end of the Oligocene to the beginning of the Pliocene.

Miocene 

the lower subdivision of Neocene rock strata, corresponding to the first, more ancient, half of the Neocene period of the earth’s geological history. In full cross sections Miocene layers are bounded by the Oligocene from below and the Pliocene from above. The Miocene was identified by C. Lyell in 1833.



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He said that the result also explains the lack of fossil record for the echidna before 13 million years ago.
Going further back, it turns out we share a common ancestor with all large primates about 13 million years ago.
One theory is that they hitched a ride across the ocean on floating debris some 13 million years ago.
 
 
 
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