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hard rock |
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hard rock [′härd ¦räk] (geology) Rock which needs drilling and blasting for removal. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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| The city's economy will benefit from the deal, says Peter Jarvis, vice-president of Underground Hardrock Mining at Sandvik. House Resolution 3968 would halt the patenting process and replace it with royalties on hardrock mining. Even ancient mining activities can release gases that make air unsafe to breathe--methane from coal mines, and carbon monoxide from so-called hardrock mines, where metals such as copper, silver, lead, cadmium, and zinc were extracted. |
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