Difference between revisions of "Oligocene Series"

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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)
(No difference)

Revision as of 16:11, 3 March 2017

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