Annual Report On The Geological Survey Of Pennsylvania, Volumes 1-4

This report, written by Pennsylvania State Geologist, Henry Darwin Rogers, is an in-depth study of the geology of Pennsylvania. It covers topics such as the geological history of the state, the mineral resources found in the area, and the topography of the state's landscape. This comprehensive report is an essential read for anyone interested in the geology of Pennsylvania or the study of geology in general.

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