Andesite-B

Andesite - B Lester Jackson , Victor Jackson

 

It is an extrusive igneous rock. It is fine grained so we don't know the grain size. It is usually medium grey in color. Hornblende, pyroxene, and biotite are some of the minerals in andesite. It usually forms along the Andes Mountains, where it is common. It forms from the cooling of lava from stratovolcanos. Some uses for andesite are buildings and construction. The andesite rock was named after the Andes Mountain. Most common in the worlds volcanic area. andesite rocks are found near the subduction zones of the ocean tectonic plates, along the continental margins. Sources: http://geology.com/rocks/andesite.shtml, http://www.pitt.edu/~cejones/GeoImages/2IgneousRocks/IgneousCompositions/5Andesite.html, http://www.daviddarling.info/encyclopedia/A/andesite.html, http://wiki.answers.com/Q/How_can_you_use_andestire&alreadyAsked=1&rtitle=What_are _the _uses_for_andesite http://www.enotes.com/earth-science/andesite, http://geology.csupomona.edu/alert/igneous/andesite.htm, http://www.galleries.com/rocks/andestire.htm,