Geography of Illinois before the dinosaurs. Galena, a lead ore, has been mined in the northwest corner of the state. The ore was processed around Peru, Illinois, where river transport was available to bring the ore to a source of coal. About six tons of coal are needed for each ton of ore. Fluorite, calcium fluoride, is the state mineral. It is mined in the southeastern portion of the state, around Metropolis. Fluorine gas is produced from fluorite. This is used in the production of uranium hexafluoride in Metropolis, Illinois for use at the gaseous diffusion plant in Paducah, Kentucky. Geodes can be
Galena, Ohio Galena, Ohio Galena is a village in Delaware County, Ohio, United States. The population was 653 at the 2010 census. Galena was originally called Zoar, and under the latter name was platted in 1816. A post office called Galena has been in operation since 1834. Galena is located at (40.215214, -82.881757). According to the United States Census Bureau, the village has a total area of , of which is land and is water. As of the census of 2010, there were 653 people, 214 households, and 172 families residing in the village. The population density was . There were 237