Photograph taken by Mark A. Wilson (Department of Geology, The College of Wooster).
[1]archive copy at the Wayback Machine
Licensing
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Captions
Late Cretaceous Pierre shale, near Ekalaka, Montana
{{Information |Description={{en|1=A broken concretion with fossils inside; Late Cretaceous near Ekalaka, Montana.}} |Source=Own work by uploader |Author=Wilson44691 |Date=June 2008 |Permission= |other_versions= }} Photograph taken by
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