Geology of Kentucky: Chapter 27, Clay
The Olive Hill fire clay is an outstanding material. This clay region centers in Carter County and extends north into Ohio and occupies an area of about 660 square miles. ... 8.—Ball clay, dark to black..... 1½ ft. 7.—Ball clay, light gray, rather massive and no trace of plants, no lamination, highest grade of ball clay, and Old Mine No. 3 ...
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