From Ohio History Central
The category of economic mineral resources includes both industrial minerals and fossil fuels. The abundance of these resources in Ohio has been of profound influence in the economic development of the state and its continued prosperity. In total, these resources have an annual value of more than 2.5 billion dollars.
The first European settlers in Ohio recognized the presence of coal in natural outcrops in stream and river banks in the eastern part of the state. As the industrial revolution began, Ohio