Cornell University Library
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Cornell University Library

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First published in 1874, this comprehensive report provides an A-Z account of geological survey work undertaken by the Pennsylvania Board of Commissioners. The book details their findings and is filled with diagrams, illustrations, and photographs of geological formations. Written for scientific researchers and geology enthusiasts, this fascinating report provides insight into the geological history of Pennsylvania. This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work is in the "public domain in the Un...