https://www.merriam-webster.com/dictionary/Morrowan
MORROWAN Definition & Meaning - Merriam-Webster
The meaning of MORROWAN is of, relating to, or constituting a subdivision of the Pennsylvanian.
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https://ilstratwiki.web.illinois.edu/index.php?title=Morrowan_Series&oldid=16412
Morrowan Series - ILSTRAT
seriesilstrat
https://ilstratwiki.web.illinois.edu/wiki/Historical:Morrowan_Series
Historical:Morrowan Series - ILSTRAT
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