Annual Report of the Geological Survey of Pennsylvania for 1886

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A detailed account of the geology of the Keystone State, based on the findings of the Geological Survey of Pennsylvania in 1886. This book provides a comprehensive overview of the state's geological history, including insights into the formation of its coal deposits, oil and gas reserves, and mineral wealth. Richly illustrated with photographs, maps, and diagrams, this book is an invaluable resource for geologists and historians alike.