English: Photograph taken by Mark A. Wilson (Department of Geology, The College of Wooster)
[1].
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{{Information |Description={{en|1=''Petrocrania'' from the Upper Ordovician of southeastern Indiana.}} |Source=Own work by uploader |Author=
Wilson44691 |Date=December 15, 2008 |Permission= |other_versions= }} Photograph taken by Mark
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