Question: Berkeleydione was discovered in fungi that lived in a copper mine located in what city?
Context: The Bagdad Mine is a large copper mine located in Arizona, in the southwestern part of the United States.  Bagdad represents one of the largest copper reserves in the United States and in the world, having estimated reserves of 873.6 million tonnes of ore grading 0.36% copper.  It is located in Yavapai County, Arizona, just west of the unincorporated community of Bagdad.  It is owned by Freeport-McMoRan.  Copper is produced from chalcopyrite and molybdenum from molybdenite.  Copper oxides include chrysocolla, malachite and azurite.  The mine's concentrator has a capacity of 75,000 metric tons per day using stockpile leaching, with pressure leaching for molybdenum. The San Manuel Copper Mine was a surface and underground porphyry copper mine located in San Manuel, Pinal County, Arizona.  Frank Schultz was the original discoverer, in 1879, but the main body of the deposits were discovered by Henry W. Nichols in 1942.  The exploration drilling went on from 1943 to 1948, with the first mine shaft built 1948.  Louis Lesser developed a mining city to service Nichols’ newly discovered deposits, and the development was completed about 1954.  The first major production began in 1955, and the mine and smelter were permanently closed in 2003. Einasleigh Copper Mine and Smelter is a heritage-listed mine at Daintree Road, Einasleigh, Shire of Etheridge, Queensland, Australia.  It was built from 1867 to 1922.  It is also known as Lynd Copper Mine and New Einasleigh Copper Mine.  It was added to the Queensland Heritage Register on 11 December 2006. The Pahaquarry Copper Mine is an abandoned copper mine located on the west side of Kittatinny Mountain presently in Hardwick Township in Warren County, New Jersey in the United States.  Active mining was attempted for brief periods during the mid-eighteenth, mid-nineteenth, and early twentieth centuries but was never successful despite developments in mining technology and improving mineral extraction methods.  Such ventures were not profitable as the ore extracted proved to be of too low a concentration of copper.  This site incorporates the mining ruins, hiking trails, and nearby waterfalls, and is located within the Delaware Water Gap National Recreation Area and administered by the National Park Service. Resolution Copper (RCM) is a joint venture owned by Rio Tinto and BHP Billiton formed to develop and operate an underground copper mine near Superior, Arizona, U.S.  The project targets a deep-seated porphyry copper deposit located under the now inactive Magma Mine.  Rio Tinto has reported an inferred resource of 1.624 billion tonnes containing 1.47 percent copper and 0.037 percent molybdenum at depths exceeding 1300 m .  The proposed mine is one of the largest copper resources in North America.  Following the passage of the 2015 National Defense Authorization Act, many Native American and conservation groups fear the copper mine will destroy sacred and environmentally sensitive land. The Schuyler Copper Mine is an abandoned, historic copper mine located in what is now North Arlington in Bergen County, New Jersey, United States.  Operations began in 1715, making it the earliest copper mine in New Jersey and one of the oldest in the United States. The Bingham Canyon Mine, more commonly known as Kennecott Copper Mine among locals, is an open-pit mining operation extracting a large porphyry copper deposit southwest of Salt Lake City, Utah, in the Oquirrh Mountains.  The mine is the largest man-made excavation in the world and is considered to have produced more copper than any other mine in history – more than 19 million tonnes.  The mine is owned by Rio Tinto Group, a British-Australian multinational corporation.  The copper operations at Bingham Canyon Mine are managed through Kennecott Utah Copper Corporation which operates the mine, a concentrator plant, a smelter, and a refinery.  The mine has been in production since 1906, and has resulted in the creation of a pit over 0.6 mi deep, 2.5 mi wide, and covering 1,900 acre .  It was designated a National Historic Landmark in 1966 under the name Bingham Canyon Open Pit Copper Mine.  The mine experienced a massive landslide in April 2013 and a smaller slide in September 2013. Berkeleydione is a marine fungal isolate with "in vitro" anticancer activity.  It was first discovered in fungal species which evolved to live in the Berkeley Pit. The Berkeley Pit is a former open pit copper mine located in Butte, Montana, United States.  It is one mile long by half a mile wide with an approximate depth of 1780 ft .  It is filled to a depth of about 900 ft with water that is heavily acidic (2.5 pH level), about the acidity of cola or lemon juice.  As a result, the pit is laden with heavy metals and dangerous chemicals that leach from the rock, including copper, arsenic, cadmium, zinc, and sulfuric acid. The Besshi copper mine (別子銅山 , Besshi dōzan ) was a rich source of copper in Niihama, Ehime Prefecture, Japan.  The deposits were discovered in 1690, and copper mining began in the following year.  From then until the closing of the mine in 1973, Besshi produced about 700,000 tons of copper, and contributed to Japan's trade and modernization.  The Sumitomo family managed the mine, which helped build the Sumitomo "zaibatsu."  The Dōzan River was named after the copper mine.
Answer: Butte, Montana