Figure 17--Maps of northeastern Kansas showing thickness of (A) rocks of Chaerokee, Marmaton, and Bourbon age, and (B) rocks of Bronson, Kansas City, and Lansing age. Isopachus lines connecting points of equal thickness are drawn at intervals of 50 ft.
Kansas Geological Survey, Forest City Basin
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Web version July 2005. Original publication date Dec. 1943.