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Geologic History of Kansas

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Figure 18

Figure 18--Map showing thickness of Pierre Shale in northwestern Kansas. Several small outliers of Pierre Sale, probably occurring in grabens, are east of east limit of formation. Contour interval 100 feet.

Pierre limited to Cheyenne, Rawlins, Decatur, Sherman, Thomas, west half of 
Sheridan, Wallace, Logan, and northwestern Gove; thickes up to 1500 in far-northwest 

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Kansas Geological Survey, Geologic History of Kansas
Comments to
Web version April 2006. Original publication date Dec. 1963.