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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 Sulphur Bank Mine ： ウィキペディア英語版 Sulphur Bank Mine The Sulphur Bank Mine is located near Clearlake Oaks and Clear Lake in Lake County, California. The mine became one of the most noted mercury producers in the world.〔 During the 150 years since the Sulphur Bank was discovered, the area has drawn geologists, inspired unique scientific theories, established constitutional case law and now attracts environmental scientists who study the impact of mercury contamination within the Cache Creek watershed of northern California and the Sacramento River-Delta Region and San Francisco Bay. ==History== Beginning in 1856, the mine was first worked for borax. Mining for sulfur began in 1865, and produced 2,000,000 pounds (909,090 kg) in four years. Mercury ore was mined intermittently by underground and open-pit methods from 1873 to 1957. Sulphur Bank Mine was credited with a total output of 92,400 flasks (7.02 million pounds) by 1918. The mine was an important producer during both world wars.〔 The mine closed in 1957 and is a California Historical Landmark (#428).〔 Sulphur Bank Mine became an Environmental Protection Agency (EPA) superfund site in 1990.〔 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「Sulphur Bank Mine」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.