Mineral Resource Map
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North America
United States
Iowa
Adair
Albright Quarry
Past Producer • Stone, Crushed/Broken
Howe Quarry
Producer • Stone, Crushed/Broken
Fort Madison Phosphoric Acid Plant
Past Producer • Phosphorus-Phosphates
Unknown
Past Producer • Sand and Gravel, Construction
Menlo Quarry
Producer • Stone, Crushed/Broken
Jefferson Quarry
Producer • Stone, Crushed/Broken