Weakley County, TN is home to the largest ball clay deposits in the United States. Four mining companies currently mine ball clay in Weakley County, TN.

Old Hickory
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Gleason Clay Company
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Kentucky-Tennessee Clay
Kentucky-Tennessee Clay Company produces ball clay and mines kaolin, as well as operates a clay processing plant.

Spinks Clay Company
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Additional information:

• Ball Clay and Bentonite Deposits of the Central and Western Gulf of Mexico Coastal Plain, United States
• Soil Survey of Weakley County, TN - 1993
• Tennessee Encyclopedia
• 1994 Ceramic Manufacturers and Suppliers Worskhop