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, Indiana Galena, Indiana Galena is a census-designated place (CDP) in Floyd County, Indiana, United States. The population was 1,818 at the 2010 census. The CDP includes the town of Galena as well as the nearby town of Floyds Knobs and their immediate surroundings. Galena was originally called Germantown, and under the latter name was platted in 1837. A post office was established as Galena in 1843, and remained in operation until it was discontinued in 1933. Galena is located at (38.350585, -85.940435). According to the United States Census Bureau, the CDP has a total area of , of which is land