Geologic events, such as volcanic activity, plan an important role in forming many of our valuable resources, such as fossil fuel, lead, copper, and gold. For example, Fig. 15.21 on. p 476 of the textbook shows the role of basaltic magma in forming one of the most valuable ores to our civilization, chromium. Seleect an important ore mined in your state or region, and discuss how geologic events played a role in forming this one. Discuss the importance of this ore in the economy of your selected area and the United States as a whole.