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Copper mining in the United States has been a major industry since the rise of the northern Michigan copper district in the 1840s. In 2014 the United States produced ...

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Dictionary of geological terms. Definitions of terminology used in geology.

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The Oak Ridges Moraine Conservation Plan is an ecologically based plan established by the Ontario government to provide land use and resource management direction for ...

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Compared to other colored gemstone operations, the pit at the Kagem emerald mine is quite massive. Blasting is used to remove the topsoil and waste rock that cover ...

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"carbonate" refers to a carbonate mineral such as calcite CaCO3 "cut-off grade" lowest grade of mineralised material considered economic, used in the calculation of ...

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Soil - Wikipedia

Soil is a mixture of minerals, organic matter, gases, liquids, and countless organisms that together support life on Earth. Soil is a natural body called the ...

Stone Glossary - Select Stone

A A-frame. A wooden or metal rack constructed in the shape of an “A” on which large stone slabs are shipped and stored. Abate. To cut away so as to leave parts in ...

Roses And Soil - Herbs2000.com

How important soil and soil preparation is for roses to grow to perfection.