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Gabbro. http:// gsi.ir /General/ Lang_en /Page_66/GroupId_01-06/DataId_589/Action_Pn4/ GABBRO.html. http:// itc.gsw.edu /faculty/ tweiland /igrx2.htm. Basalt. http:// www.sandatlas.org /2012/12/basalt/. http:// geology.com /rocks/ basalt.shtml. Granite.
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Gabbro http://gsi.ir/General/Lang_en/Page_66/GroupId_01-06/DataId_589/Action_Pn4/GABBRO.html http://itc.gsw.edu/faculty/tweiland/igrx2.htm
Basalt http://www.sandatlas.org/2012/12/basalt/ http://geology.com/rocks/basalt.shtml
Granite http://geology.com/rocks/granite.shtml
Rhyolite http://geology.com/rocks/rhyolite.shtml http://marsrovers.nasa.gov/classroom/schoolhouse/rocklibrary/source/rhyolite.html
Diorite http://www.blinn.edu/brazos/natscience/geol/Igneous_Web_Page/pages/Diorite.htm http://geology.com/rocks/diorite.shtml
Andesite http://www.pitt.edu/~cejones/GeoImages/2IgneousRocks/IgneousTextures/4PorphyriticFineGrained.html http://geology.com/rocks/andesite.shtml