Plate 6--A, Natural outcrop of Fort Riley limestone member of the Barneston limestone near the Cen. E. line sec. 34, T. 5 S., R. 6 E., showing "rim rock" type of outcrop; B, Glacial till overlying the Atchison formation in the NW sec. 4, T. 4 S., R. 6 E.; the head of the hammer is resting on the contact.
Kansas Geological Survey, Geologic History of Kansas
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Web version March 2004. Original publication date March 1954.