Abstract
DR T. B. ANDERSON1 considers that kink-bands are symmetrically distributed about a planar anisotropy caused by cleavage, and that this is indicative of the major principal pressure acting within the cleavage. This is not justified since in rocks with strong planar anisotropism there is no basis for interpreting “a component parallel to the strike of the s-surface”1,2 as the maximum principal pressure. Indeed, according to Hoeppener3, the view that the maximum principal stress bisects the obtuse dihedral angle may be fallacious.
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References
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MARSHALL, B. Kink-bands and Related Geological Structures. Nature 204, 772–773 (1964). https://doi.org/10.1038/204772b0
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DOI: https://doi.org/10.1038/204772b0
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