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Direct stereographic determination of the optic axes from a ,few extinction measurements: a progressive elimination technique

Published online by Cambridge University Press:  14 March 2018

F. E. Tocher
F. E. Tocher*
Affiliation:
Department of Geology and Mineralogy, University of Aberdeen
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Summary

A new method of determining the optic axes from a few extinction measurements is presented. It is based on the progressive elimination of those parts of the stereogram in which it is obvious that the optic axes cannot lie. It has two applications: as a valid method in its own right, if applied systematically; and as a reconnaissance technique. The second application permits, for example, the recently presented trisogon technique to be rapidly and economically applied over a very small fraction of the stereogram instead of over its whole area.

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 33 , Issue 264 , March 1964 , pp. 780 - 789
Copyright
Copyright © 1964, The Mineralogical Society

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References

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