Difference between revisions of "Andesite"
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| − | [[File:1980.73-SC24363.jpg|thumb|]] | + | [[File:1980.73-SC24363.jpg|thumb|Carved andesite porphyry<br>MFA# 1980.73]] |
== Description == | == Description == | ||
[[File:andesite_USGS.jpg|thumb|Andesite]] | [[File:andesite_USGS.jpg|thumb|Andesite]] | ||
Latest revision as of 13:19, 26 April 2022
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.
Resources and Citations
- Encyclopedia Britannica, http://www.britannica.com Comment: "andesite." Accessed 21 Jan. 2005 .
- Wikipedia: http://en.wikipedia.org/wiki/Andesite