Industrial mineral site no. 269, known as "Fitzgerald" is a site in Spokane County, Washington. This site has been associated with refractory clays and shales. A notation found in DGER Bulletin 37 on page 26 says "Semi-refractory Latah clay", and designates the value as "Warrants investigation".
U.S. Department of the Interior
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U.S. Geological Survey
