KGS Cyclic Sedimentation Original published in D.F. Merriam, ed., 1964, Symposium on cyclic sedimentation: Kansas Geological Survey, Bulletin 169, pp. 541-563

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Figure 8--Concretions from Lower nicolleti Assemblage Zone. A, Partly prepared core of large nicolleti concretion; note random orientation. B, Split small concretion from western phase of zone.

black and white photo of two concretions; upper sample is concretion of many individuals

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Kansas Geological Survey
Comments to
Web version March 2003. Original publication date Dec. 1964.