A mound of debris at Coober Pedy's opal mines after being cleared from an underground shaft created by an explosive charge

A mound of debris at Coober Pedy's opal mines after being cleared from an underground shaft created by an explosive charge

Paul A. Souders/CORBIS ©

A mound of debris at Coober Pedy's opal mines after being cleared from an underground shaft created by an explosive charge

A mound of debris at Coober Pedy's opal mines after being cleared from an underground shaft created by an explosive charge

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