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Kansas Geological Survey, Current Research in Earth Sciences, Bulletin 240, part 3
Chert Gravel and Neogene Drainage in East-central Kansas--Fig. 5

Fig. 5. Exposure of Florence Limestone in eastern Butler County. Light gray beds and nodules of chert weather out at the surface and accumulate as a residual lag deposit on Flint Hills uplands. Scale pole marked in feet.

Kansas Geological Survey
Web version March 18, 1998
http://www.kgs.ku.edu/Current/1997/aber/fig5.html
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