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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Silver mining in Colorado ： ウィキペディア英語版 Silver mining in Colorado Silver mining in Colorado has taken place since the 1860s. In the past, Colorado called itself the ''Silver state''. (Nevada also calls itself the ''Silver state''. Idaho, however, actually produces the most silver in the US.) }} ==Central City-Idaho Springs district== Silver veins were discovered in the Central City-Idaho Springs district a short time after gold was discovered there in 1859. However, mining the silver veins was delayed for the most part until smelters were built in the late 1860s. The veins of the district are zoned in a roughly concentric manner, with gold-bearing pyrite veins in the center, and silver-bearing galena veins more common in the outlying areas. 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「Silver mining in Colorado」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.