File:Petrology Igneous.jpg

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Summary

DescriptionPetrology Igneous.jpg	English: Total alkali (N2O + K2O) versus silica (SiO2), or TAS, classification system of igneous rocks. After Le Maitre (2002).
Date	2012
Source	Figure 15.2 on page 237 of chapter 15 of Shanks III, W.C.P. and Thurston, R. (editors) (2012) Volcanogenic Massive Sulfide Occurrence Model, US Dept. of the Interior, U.S. Geological Survey Scientific Investigations Report 2010-5070-C.
Author	W. Ian Ridley

Licensing

This image is in the public domain in the United States because it only contains materials that originally came from the United States Geological Survey, an agency of the United States Department of the Interior. For more information, see the official USGS copyright policy.

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	13:20, 6 November 2014		755 × 527 (78 KB)	Pi3.124	User created page with UploadWizard

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