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The Deformation of Confined, Incompetent Layers in Folding

Published online by Cambridge University Press:  01 May 2009

Emyr Williams
Emyr Williams
Affiliation:
Geological Survey Department, P.O. Box 789, Georgetown, British Guiana.
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Abstract

Shearing stresses acting on an incompetent layer confined between competent beds during its deformation in the development of folds, differ from those commonly accepted as the cause of a number of minor structures associated with the deformation. It is suggested that the effect of bedding drag is negligible, and that the structures described as slaty cleavage, fracture cleavage, and drag folds can be explained by the laminar flow of the incompetent material whilst accommodating itself to the interspaces determined by the more competent layers.

Type
Articles
Information
Geological Magazine , Volume 98 , Issue 4 , August 1961 , pp. 317 - 323
Copyright
Copyright © Cambridge University Press 1961

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References

REFERENCES

Carey, S. W., 1954. The Rheid Concept in Geotectonics. J. geol. Soc. Austral., 1, 67–117.Google Scholar
Cloos, E., 1947. Oölite Deformation in the South Mountain Fold, Maryland. Bull. geol. Soc. Amer., 58, 843–918.CrossRefGoogle Scholar
Collette, B. J., 1958. On the Origin of Schistosity. Verh. Kon. Ned. Akad. v. Wet. Amsterdam, Ser. B, 61, No. 2, 121–139.Google Scholar
De Sitter, L. U., 1956. Structural Geology. New York.Google Scholar
Harker, A., 1939. Metamorphism. Revised Edition, London.Google Scholar
Hills, E. S., 1940. Outlines of Structural Geology. London.Google Scholar
Hills, E. S., 1953. Outlines of Structural Geology. Revised Edition, London.Google Scholar
Leith, C. K., 1913. Structural Geology. New York.Google Scholar
Mead, W. J., 1940. Folding, Rock Flowage, and Foliate Structures. J. Geol., 48, 1007–1021.Google Scholar
Nevin, C. M., 1949. Principles of Structural Geology. New York.Google Scholar
Sharpe, D., 1847. On Slaty Cleavage. Quart. J. geol. Soc. Lond., 3, 74–105.CrossRefGoogle Scholar
Sorby, H. C., 1853. On the Origin of Slaty Cleavage. Edinb. New Phil. J., 55, 137–147.Google Scholar
White, W. S., 1949. Cleavage in East-Central Vermont. Trans. Amer. geophys. Un., 30, 587–594.Google Scholar
Williams, E., 1960. Intra-stratal Flow and Convolute Folding. Geol. Mag., 97, 208–214.Google Scholar
Willis, B., 1923. Geologic Structures. New York.Google Scholar
Wilson, G., 1946. The Relationship of Slaty Cleavage and Kindred Structures to Tectonics. Proc. Geol. Ass., Lond., 57, 263–300.Google Scholar