where does galena form?
It is also found in metamorphic and sedimentary rocks. In the United States galena is found in the Mississippi Valley. Missouri, Illinois, Iowa, and Wisconsin all have significant deposits. The Rocky Mountain States of Colorado, Utah, Idaho, and Montana also have significant deposits. Location: Missouri, Illinois, Iowa, and Wisconsin all have significant deposits.
Galena is the official state mineral of the U.S. states of Missouri and Wisconsin; the former mining town of Galena, Kansas takes its name from deposits of this mineral. Derbyshire in the UK was one of the main areas where galena was mined.