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Hydrated Halloysite in Blue Hill Shale

Published online by Cambridge University Press:  01 January 2024

Ada Swineford ,
John D. McNeal  and
Carl F. Crumpton
Ada Swineford
Affiliation:
State Geological Survey, University of Kansas, Lawrence State Highway Commission of Kansas, Manhattan, USA
John D. McNeal
Affiliation:
State Geological Survey, University of Kansas, Lawrence State Highway Commission of Kansas, Manhattan, USA
Carl F. Crumpton
Affiliation:
State Geological Survey, University of Kansas, Lawrence State Highway Commission of Kansas, Manhattan, USA
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Abstract

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Nodules of alunite and hydrated halloysite occur in the upper part of the Cretaceous Blue Hill shale at three localities in west-central Kansas. They have formed at the contact of septarian concretions with the shale and are associated with gypsum. The nodules are judged to have been formed by the action of sulfuric acid from pyrite on the potassium-bearing minerals of the Blue Hill shale, perhaps under special conditions of pH and Eh produced locally by the presence of septaria.

The minerals were studied and identified by x-ray diffraction, thermal data, chemical analysis, and electron and light microscopy.

Type
Article
Information
Clays and Clay Minerals (National Conference on Clays and Clay Minerals) , Volume 2: Publication 327, University of Missouri, Columbia, Missouri, October 15-17, 1953 , February 1953 , pp. 158 - 170
Copyright
Copyright © Clay Minerals Society 1953

References

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