Located west of the town of Fairfield.
Refs.:
- The mineralogy and paragenesis of the variscite nodules from near Fairfield, Utah. American Mineralogist (1942): 27: 281-300, 350-372, and 441-451.
- Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged, 1124 pp.: 942, 958, 976, 979, 980.
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http://www.mines.utah.edu/~jmarty/utah_minerals/clay_canyon.html
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http://www.minsocam.org/MSA/collectors_corner/arc/fairfield1.htm
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http://www.minsocam.org/MSA/collectors_corner/arc/fairfield2.htm
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http://www.minsocam.org/MSA/collectors_corner/arc/fairfield3.htm
34 entries listed. 15 valid minerals. 6 type localities (valid minerals).