Pennsylvanian Invertebrates of the Mazon Creek Area, Illinois: The Essex Fauna and Medusae: Fieldiana, Geology, Vol.12, No.7 (Paperback) (ISBN-13: 9781021494986)

This comprehensive study of fossilized invertebrates in the Mazon Creek area reveals the diverse range of species that inhabited the ecosystem during the Pennsylvanian period. A must-read for geologists and paleontologists alike.

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