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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.
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