After the discovery of the Comstock Lode in 1859, the town developed seemingly overnight on the eastern slopes of Mount Davidson, perched at a 6200-foot elevation. Below the town were dug intricate tunnels and shafts for silver mining. The Comstock Lode discovery and subsequent growth of Virginia City was unequaled by the history of other precious metal discoveries. By 1876 Nevada produced over half of all the precious metals in the United States. The Comstock produced silver and gold ore valued at hundreds of thousands of dollars annually. The wealth supported the Northern cause during the American Civil War and flooded the world monetary markets, resulting in economic changes.