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Joints: Their Initiation and Propagation with Respect to Bedding

Published online by Cambridge University Press:  01 May 2009

Patrick Arthur Hill
Patrick Arthur Hill
Affiliation:
82 Fulton Avenue, Ottawa 1, Ontario.
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Abstract

Joints (fractures) are propagated from areas of high to areas of low stress. They may originate at inhomogeneities on, or by slickensiding along bedding planes. Plumose marks on the surfaces of joints radiating from volcanic, meteor, or man-made explosion craters should, in stratified rock, reveal whether the joints were propagated with their leading edge convex or concave forward.

Information

Type
Articles
Information
Geological Magazine , Volume 103 , Issue 3 , June 1966 , pp. 276 - 279
Copyright
Copyright © Cambridge University Press 1966

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References

REFERENCES

Hancock, P. L., 1965. Axial-trace-fractures and deformed concretionary rods in south Pembrokeshire. Geol. Mag., 102, 143–163.CrossRefGoogle Scholar
Hill, P. A., 1965. Curviplanar (radial, bow-tie, festoon) and concentric jointing in Jurassic dolerite, Mersey Bluff, Tasmania. J. Geol., 73, 255–270.CrossRefGoogle Scholar
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Roberts, J. C., 1961. Feather-fracture and the mechanics of rock-jointing. Am. J. Sci., 259, 481–492.Google Scholar