Oligocene Series: Difference between revisions

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m (IlLex moved page Oliocene Epoch to Oliocene Series without leaving a redirect)
 
m (IlLex moved page Oliocene Series to Oligocene Series without leaving a redirect)
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Revision as of 16:11, 3 March 2017

There are currently no known geologic units of Oliocene age in Illinois.