Acid+Mine+Drainage

Acid mine drainage occurs when mineral deposits that contain sulfides are uncovered during a mining process such as strip mining, cavern mining, or sedimentary (Relating to rocks formed when sediment is deposited and becomes tightly compacted. Depending on the origin of the sediments they contain) mining.

This type of activity can occur when mining numerous amounts of minerals and metals including coal, copper, gold, silver, zinc, lead, and uranium. Many companies are scoring the earth in search of precious metals.