Difference between revisions of "Andesite"
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== Authority == | == Authority == | ||
| − | * ''Encyclopedia Britannica'', http://www.britannica.com Comment: "andesite." | + | * ''Encyclopedia Britannica'', http://www.britannica.com Comment: "andesite." Encyclopædia Britannica. 2005. Encyclopædia Britannica Premium Service 21 Jan. 2005 . |
* Wikipedia, the free encyclopedia, at http://www.wikipedia.com Comment: http://en.wikipedia.org/wiki/Andesite | * Wikipedia, the free encyclopedia, at http://www.wikipedia.com Comment: http://en.wikipedia.org/wiki/Andesite | ||
Revision as of 06:25, 24 July 2013
Description
A fine-grain, volcanic rock primarily containing andesine (a plagioclase feldspar). Andesite may also contain smaller amounts of biotite, hornblende, and pyroxene. Commonly found on the western coast of South America, andesite is named for the Andes mountains.
Additional Images
Andesite
Authority
- Encyclopedia Britannica, http://www.britannica.com Comment: "andesite." Encyclopædia Britannica. 2005. Encyclopædia Britannica Premium Service 21 Jan. 2005 .
- Wikipedia, the free encyclopedia, at http://www.wikipedia.com Comment: http://en.wikipedia.org/wiki/Andesite