Idaho's Silver Valley has produced approximately 1.2 billion ounces of silver since the late 1800s.
The silver output is equivalent to a solid cube as tall as a five-story building.
The region has also yielded significant amounts of lead and zinc.
Strategic angle: A new study reveals the geological history behind Idaho's Silver Valley, known for its massive silver production.
Idaho's Silver Valley has produced approximately 1.2 billion ounces of silver since the late 1800s.
The silver output is equivalent to a solid cube as tall as a five-story building.
The region has also yielded significant amounts of lead and zinc.