This book is a comprehensive study of the Middle Devonian period in Ohio, a time when the state was covered by a shallow sea. The book includes detailed geological maps and descriptions of the various rock formations, as well as analyses of the fossils found in the area. It is an invaluable resource for paleontologists and geologists, as well as anyone interested in the natural history of Ohio.

This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it.

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