Kink Bands of Non-Tectonic Origin
| Autor: | Richard A. Gilman |
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| Rok vydání: | 1968 |
| Předmět: | |
| Zdroj: | The Journal of Geology. 76:702-709 |
| ISSN: | 1537-5269 0022-1376 |
| DOI: | 10.1086/627393 |
| Popis: | Microscopic kink bands have been found associated with cone-in-cone concretions in undeformed Devonian shales in western New York. The kink bands occur in a continuous zone around the thin edge of the discus-shaped concretions. It is interpreted that the kink bands developed in response to the syngenetic expansion of the concretions while the enclosing sediment was still plastic. The geometry of the kink bands suggests that the kinking mechanism involved rotation of the bedding in the enclosing shale by continuous simple shear parallel to the kink plane, rotation by bedding-plane slip in the center of the kink band, and the locking of the bedding in its new orientation at approximately 90° to the inferred direction of maximum compressive stress. |
| Databáze: | OpenAIRE |
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