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Demonstrations in petrogenesis from Kiloran Bay, Colonsay

I. The transfusion of quartzite

Published online by Cambridge University Press:  14 March 2018

Doris L. Reynolds
Doris L. Reynolds*
Affiliation:
University of Durham
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Extract

In 1911 Dr. W. B. Wright briefly described the felspathized quartzite blocks in the hornblendite of Port Easdale, Kiloran Bay, Colonsay, Hebrides. He showed that the exposures provide a conclusive demonstration that the action of hornblendite magma on quartzite xenoliths was to convert them to alkali-felspar and quartz, so that in the final stage ‘one can recognize in numerous angular and rounded patches of felspathic material, without visible xenolithic core, the ghosts of former masses of quartzite’.

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 24 , Issue 155 , December 1936 , pp. 367 - 407
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1936

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References

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