Boone limestone underlies a large area in southwestern Missouri, northern Arkansas, and northeastern Oklahoma. It forms a thin clay soil generally containing an abundance of chert fragments. Although much has been written about the origin of the chert, a re-examination of the problem from a new point of view may yield conclusions of value, for diversity of opinion still exists among students. A part of the summer of 1931 was spent by the writer in field work in northwestern Arkansas, and the study was continued in a larger area during the summer of 1932. Grateful acknowledgment is herewith made to the Research Committee of the University of Arkansas for grants made in 1931, 1932, and 1933, in support of this investigation.


The Boone limestone was named for Boone County, northern Arkansas, by J. C. Branner nearly half a century ago. The area of its outcrop in . . .

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