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Quarry or open pit mine. | |
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Gravel, sand, clay or borrow pit. | |
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Mine tunnel or cave entrance. | |
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Prospect; Mine shaft. | |
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Mine dump. | |
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Mill tailings. The discarded materials from ore treatment processes. In some cases, the mill wastes are in the form of finely divided particles suspended in water and disposed of in tailings ponds. | |