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Transcription
The Pierre Shale, as developed in western Kansas, represents an extended period of
regressive-type sedimentation that apparently proceeded, more or less uninterrupted, for
the duration of Pierre deposition.* Pierre rocks of Kansas are analogous to phase (5) of
the first cyclothem. Transgressive phases of this second cycle of sedimentation are unrepre-
sented in Kansas for reasons outlined above, but are represented at least in part, farther
to the west and northwest in Colorado and the Black Hills. Regressive phases (6) and (7),
if ever deposited in Kansas, have been entirely removed by pre-Pliocene erosion.
*It should be noted that in other regions of the Western Interior the Pierre Shale and Fox
Hills Sandstone and equivalent beds contain evidence of two additional cycles of sedimen-
tation not evident in Kansas.
REFERENCES
Bass, N. W., 1926, Geologic investigations in western Kansas: Kansas Geol. Survey Bull. 11,
pt. 1, p. 1-52.
Darton, N. H., 1904, Comparison of the stratigraphy of the Black Hills, Bighorn Mountains,
and Rocky Mountain Front Range: Geol. Soc. America Bull., v. 15, p. 379-448.
Elias, M. K., 1931, The geology of Wallace County, Kansas: Kansas Geol. Survey Bull. 18,
254 p.
Franks, P. C., and others, 1959, Cross-stratification, Dakota Sandstone (Cretaceous), Ottawa
County, Kansas: Kansas Geol. Survey Bull. 134, pt. 6, p. 223-238.
Frye, J. C., and Leonard, A. B., 1952, Pleistocene geology of Kansas: Kansas Geol. Survey
Bull. 99, 230 p.
Frye, J. C., and Schoewe, W. H., 1952, The basis for physiographic subdivision of Kansas:
Kansas Acad. Sci. Trans., v. 56, no. 2, p. 246-252.
Gilbert, G. K., 1896, The underground water of the Arkansas Valley in eastern Colorado: U. S.
Geol. Survey, 17th Ann. Report, pt. 2, p. 551-601.
Hall, James, and Meek, F. B., 1856, Descriptions of new species of fossils, from the Cretaceous
formations of Nebraska, with observations upon Baculites ovatus and B. compressus, and
the progressive development of the septa in Baculites, Ammonites, and Scaphites: Am.
Acad. Arts and Sci., Mem., n.s., v. 5, p. 379-411.
Hattin, D. E., 1962, Stratigraphy of the Carlile Shale (Upper Cretaceous) in Kansas: Kansas
Geol. Survey Bull. 156, 155 p.
_____, 1965, Marine macro-invertebrates in the Dakota Formation (Upper Cretaceous) of
west-central Kansas (abs.): Geol. Soc. America Spec. Paper 82, p. 87-88.
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