| 11. | The country is Africa's sixth highest producer of phosphate rock.
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| 12. | This process also has intermediate reactions, and as such, the phosphate rock created has impurities.
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| 13. | Togo mines gold, diamonds, and phosphate rock, with the largest of these being phosphate rock.
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| 14. | Togo mines gold, diamonds, and phosphate rock, with the largest of these being phosphate rock.
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| 15. | The last mine in Tennessee, which produced phosphate rock from the Bigby-Cannon formation, closed in 1991.
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| 16. | Phosphate rock was formerly mined in Beaverhead, Granite, Powell, and Silver Bow counties in southwest Montana.
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| 17. | Some phosphate rock deposits are notable for their inclusion of significant quantities of radioactive uranium isotopes.
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| 18. | Nonetheless, the Soviet Union was a stable importer of some minerals, particularly bauxite and phosphate rock.
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| 19. | All that the Japanese had gained was some phosphate rock which was loaded on the transport ships.
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| 20. | Phosphorus occurs in minerals of the apatite family which are the main components of the phosphate rocks.
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