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On the delimitation of diorite and gabbro and related rocks

Published online by Cambridge University Press:  14 March 2018

S. E. Ellis*
Affiliation:
Department of Mineralogy, British Museum

Extract

There is general agreement as to the basis on which most major igneous rock-types are defined despite some difference of opinion as to quantitative limits. This is not true of diorites and gabbros (or of their hypabyssal and volcanic equivalents) in distinguishing between which at least four different criteria are in current use.

Type
Research Article
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1948

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