Oklahoma Miscellaneous
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Historically, lead, zinc, and copper have been very important to local economies, although no metals were produced into the twenty-first century. One of the centers for lead and zinc production was the Miami-Picher area of Ottawa County, in the world-famous Tri-State Mining District of northeastern Oklahoma, southeastern Kansas, and southwestern Missouri. Underground mines in Ottawa County produced approximately 1.3 million tons of lead and 5.2 million tons of zinc between 1891 and 1970, when the last mine was closed. Oklahoma led the United States in zinc production almost every year from 1918 through 1945.
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