Changes

'''Mines, quarries, and pits''' are uses of [[land]] for extraction of ores, minerals, and rock materials; a subcategory of the Land cover/use category Barren land.  

 

'''Mines, quarries, and pits''' are   - according to the [[USDA]] terminology -  ''"uses of [[land]] for extraction of ores, minerals, and rock materials; a subcategory of the Land cover/use category Barren land. "<ref>[http://www.nrcs.usda.gov/technical/NRI/1997/summary_report/glossary.html List of USDA terminology]</ref>''

==References==  

==References==  

[http://www.nrcs.usda.gov/technical/NRI/1997/summary_report/glossary.html List of USDA terminology] <br>

<references />

[[Category:Minerals]]

[[Category:Agriculture]]

{{USDA_Terms}}

{{USDA_Terms}}