Hostname: page-component-586b7cd67f-g8jcs Total loading time: 0 Render date: 2024-11-22T22:40:06.128Z Has data issue: false hasContentIssue false

VII.—A Method of Classifying Igneous Rocks according to their Chemical Composition

Published online by Cambridge University Press:  01 May 2009

Extract

The chemical classification of igneous rocks is rendered difficult by the large number of substances which are present in them. H. S. Washington, who based his system of classification upon the composition of standard rock-forming minerals, found it necessary in his great work to divide his 2,880 rocks into no less than 167 final groups in order to ensure a close proximity between the rocks within each group.

Type
Original Articles
Copyright
Copyright © Cambridge University Press 1906

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1 Washington, H. S., “Chemical Analyses of Igneous Rocks”; Washington Government Printing Office, 1903.Google Scholar