Open pit Gold Mine, ColoradoNovember 12, 2017/in Environmental/Engineering Geology/by Marli Miller mining, metals, resources https://geologypics.com/wp-content/uploads/2017/04/geologic-time-pics-logo-300x115.png 0 0 Marli Miller https://geologypics.com/wp-content/uploads/2017/04/geologic-time-pics-logo-300x115.png Marli Miller2017-11-12 11:03:552017-11-25 21:10:29Open pit Gold Mine, Colorado
