Report of Progress; Volume 2 (Hardcover) (ISBN-13: 9781021066541)

Report of Progress is a series of reports published by the Geological Survey of Pennsylvania in the late 19th century. Intended to provide detailed information about the geology of the state, the reports cover everything from rock formations to mineral resources to topographical features. Written by experts in the field, these reports are an invaluable resource for anyone interested in the geological history of Pennsylvania.

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