by J. Sheldon Carey, John C. Frye, Norman Plummer, and Ada Swineford
Originally published in 1952 as Kansas Geological Survey, Bulletin 96, Part 1.
This online version has been created because the published version is currently out of print. This is, in general, the original text as published in 1952.
Kansas Geological Survey, Kansas Volcanic Ash Resources
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Web version Jan. 2005. Original publication date Feb. 15, 1952.