Fort Dodge Gypsum: A Salt from Iowa's Jurassic Sea
two shifts a day, and four companies process gypsum, operating their mills 24 hours a day. The most recent production data available (1994) indicates that a total of about 1.5 million tons of Fort Dodge gypsum are mined yearly, with a value of $10 million. The Fort Dodge area accounts for about 75% of Iowa's total gypsum production, and the
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