What are the main methods of mining? . American Geosciences .
There are four main mining methods: underground, open surface (pit), placer, . Mine trucks moving material from the Cripple Creek and Victor Gold Mines in.
The Real Price of Gold National Geographic
The Price of Gold: In dollars and suffering, it's never been higher. . it rich, illegal miners claw sacks of "money stone"gold orefrom the Pra River in Ghana. .. Employing crude methods that have hardly changed in centuries, they produce.Get Price