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Gravel extraction : ウィキペディア英語版 | Gravel pit
Gravel pit is an open-pit mine for extraction of gravel. Gravel pits often lie in river valleys where the water table is high, so they may naturally fill with water to form ponds or lakes. Old, abandoned gravel pits are normally used either as nature reserves, or as amenity areas for water sports, landfills and walking. In addition, many gravel pits in the United Kingdom have been stocked with freshwater fish such as the common carp to create coarse fishing locations.
File:Kongensbro gravel pit 2014-09-17 Diliff Reprocess.jpg|Panorama of a gravel pit near Ans, Denmark
==Gallery==
File:Aerial fg103 DSC 1469 Kiesgrube bei Geinsheim.JPG|A gravel pit in Germany File:Naturalizedgravelpit.JPG|A naturalized gravel pit, now Silver Springs Park in East St. Paul, Manitoba.
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Gravel pit」の詳細全文を読む
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